How do I use Hot Shot Ant & Roach Plus Germ Killer Spray correctly?

Shake the can and hold it upright about 12 inches from the surface. Aim directly into cracks, crevices, baseboard gaps, under and behind appliances, and other harborage — not into open air — spraying until the surface is slightly wet, never to runoff. Hit any visible ants or roaches directly for fast knockdown. Let treated non-porous surfaces dry undisturbed, since both the insecticidal residual and the germ-reduction claim depend on that. The single biggest factor in pest-control results is where you aim it: a pinpoint application into the crack or gap where pests actually travel does far more than misting an open room.

Does the insecticide in this spray actually work?

For what a contact aerosol can do, yes — aimed correctly it reliably and quickly kills the ants and roaches you can see and leaves a residual on the non-porous cracks you treat. What it doesn't do is end an established infestation. It's a standard dual-pyrethroid contact aerosol, and independent university testing on comparable products found under 20% mortality against German cockroaches exposed to treated surfaces, because the reproducing population behind the wall or in a void is never touched by a surface spray. The 'germ killer' half of the name has no bearing on this — it's a separate claim entirely.

Does the 'germ killer' claim actually mean it disinfects my kitchen?

Only in a narrow, one-time sense. The label states the product reduces 99.9% of two named bacteria (Staphylococcus aureus and Klebsiella pneumoniae) on hard, non-porous, non-food-contact surfaces at the moment of application — but it also states plainly that there is 'no residual sanitizer action' and the product is 'not for primary use as a sanitizer.' Treat any germ reduction as a bonus on the surface you were already spot-treating for pests, and keep using a dedicated disinfectant cleaner for actual household sanitizing.

Why do I still see roaches or ants after spraying?

A contact aerosol kills what it directly touches, not the colony or breeding population producing more insects out of sight — and the germ-killer component has no effect on this at all. If roaches or ants keep appearing after a few weeks of correctly aimed, harborage-focused spraying, that's a sign the source — a German-roach population, a satellite ant colony, or a nest in a void — is beyond what a spray can reach. At that point, adding a gel or liquid bait program, or calling a licensed professional, addresses the actual source instead of just the visible symptoms.

Can I spray it near or over ant bait to speed things up?

No — this is one of the most common ways people undercut their own results, and it applies here just as it does to any pyrethroid aerosol. The repellent residue drives ants and roaches away from a bait placement instead of letting them carry the toxicant back to the colony, which is the entire mechanism that makes baiting work against a hidden population. Keep any spray application and any bait placement in physically separate areas of the home; combining the two on the same surface typically performs worse than baiting alone.

Is it safe to use around my pets?

The practical precaution is to keep pets and kids out of the room during application and off treated surfaces until everything is fully dry and the space is ventilated — that's when exposure risk is highest. This is a pyrethroid aerosol with an added phenolic disinfectant, so avoid spraying near open food, fish tanks, or bird cages. For the full per-species pet-safety verdict on this specific product, see the companion review at /is-pest-control-safe-for-pets/ant-roach-plus-germ-killer-spray-by-hot-shot.

Daniel Brady · NH-Licensed Pesticide Applicator · License #782664

How to Use Ant & Roach Plus Germ Killer Spray by Hot Shot

Workhorse

Prallethrin 0.025%Lambda-cyhalothrin 0.010%o-Phenylphenol 0.100%

Hot Shot Ant & Roach Plus Germ Killer does two separate jobs, and it's worth judging them separately. As an insecticide, it's a ready-to-use pyrethroid aerosol (prallethrin plus lambda-cyhalothrin) that works exactly like every other contact spray in this category: aim it into cracks, baseboard gaps, and harborage until the surface is slightly wet, and it knocks down visible ants and roaches fast with a residual that lasts on non-porous surfaces. As a 'germ killer,' the o-phenylphenol in the formula reduces two specific bacteria by 99.9% on hard, non-porous, non-food-contact surfaces the moment it's applied — but the label itself says this has 'no residual sanitizer action' and the product is 'not for primary use as a sanitizer,' so it's a bonus, not a cleaning-product replacement. Crucially, the germ claim tells you nothing about pest control: independent testing on comparable pyrethroid sprays found under 20% mortality against German cockroaches exposed to treated surfaces, so an established infestation is still beyond what this can — or any contact aerosol — can finish.

At a glance

Efficacy: Workhorse
Best job: Killing visible ants and roaches on contact and treating harborage cracks, with a bonus one-time reduction of certain surface germs where insects crawled
Format: Ready-to-use (RTU) water-based aerosol — no mixing; combines an insecticide with a separate surface-disinfectant claim (EPA Reg. No. 9688-317-8845)
Technique: Easy technique

The honest verdict

Does this product actually work?

The verdict on this product

WorkhorseEasy technique

Workhorse

A genuine workhorse for spot knockdown and crack treatment — and the 'germ killer' claim is a separate function that doesn't change that verdict either way.

This is a standard synthetic-pyrethroid contact aerosol with a phenolic disinfectant added on top — two genuinely separate jobs bundled into one can. Aimed into cracks and harborage, it kills visible ants and roaches fast, same as any comparable pyrethroid spray, and independent testing on this class of product shows under 20% mortality against German cockroaches on treated surfaces, so it carries the same infestation ceiling. The 'plus germ killer' claim is real but narrow — a 99.9% reduction of two named bacteria on hard, non-porous, non-food-contact surfaces, with no lasting sanitizing power — so don't let it inflate your expectations of the pest-control side, and don't use it as a substitute for an actual disinfectant cleaner.

Best for

Killing the ants and roaches you can see, treating the cracks and harborage they hide in, and getting a one-time germ reduction on the hard surfaces you treat.

Skip it for

Ending an established German cockroach infestation or a hidden ant colony, and for any use as a household disinfectant — the label is explicit that the germ claim has 'no residual sanitizer action.'

Read the label first

What it is — and what it's really for

The label is the law. Here's the honest read on the format, the one job it does well, and the job people wrongly buy it for.

Format

Ready-to-use (RTU) water-based aerosol — no mixing; combines an insecticide with a separate surface-disinfectant claim (EPA Reg. No. 9688-317-8845)

Indoor / outdoor

indoor

Residual

The label markets residual insecticidal action up to about 12 weeks on non-porous surfaces; independent testing on comparable pyrethroid contact sprays shows well under 20% mortality against German cockroaches exposed to treated surfaces, so treat the residual figure as an upper bound, not a guarantee against an infestation

Target pests

Cockroaches (excluding Oriental cockroaches on porous surfaces), Ants (excluding fire and pharaoh ants), Carpenter ants, Crickets, Firebrats, Fleas, Silverfish, Spiders (except brown recluse)

Best job

Killing visible ants and roaches on contact and treating harborage cracks, with a bonus one-time reduction of certain surface germs where insects crawled

Active ingredient

Prallethrin (0.025%), Lambda-cyhalothrin (0.010%), o-Phenylphenol (0.100%)

Not for (honest)

Ending an established infestation, or relying on the 'germ killer' half as your household disinfectant — the label states it has no residual sanitizer action and isn't meant as a primary sanitizer

The technician's method

The technique walkthrough

Where DIY succeeds or fails is in the placement, patience, and the small pro moves the label never mentions. Follow the label; these are the technique details on top of it.

Easy technique~5-15 min to apply; knockdown in seconds to minutes on direct hitsTools:The can (shake before use), Gloves (optional), A rag to wipe overspray

Treat this as an insecticide first and a surface-germ bonus second — the correct crack-and-crevice technique is identical to any pyrethroid contact spray, and chasing the germ claim by over-applying just wastes the can.

Identify the harborage, not just the bug
Locate where ants and roaches are actually hiding — behind and under appliances, under sinks, along baseboards, cabinet corners, and cracks around pipes — before you spray anything.
Pro move
Roaches cluster near moisture and food; check under the sink, behind the fridge, and along baseboard gaps first.
Common mistake
Spraying the open counter because you want the 'germ kill' effect there too — the label restricts the germ claim to hard, non-porous, non-food-contact surfaces, and a kitchen counter used for food prep isn't the right target either way.
Shake well and hold the can correctly
Shake the can, then hold it upright about 12 inches from the surface you're about to treat.
Treat the crack, not the room
Aim the nozzle directly into cracks, crevices, and harborage surfaces — behind appliances, under sinks, baseboard gaps — spraying until slightly wet, never to runoff.
Pro move
A pinpoint bead into a baseboard gap does more than fogging a whole kitchen — crack-and-crevice placement is what actually reaches where roaches live, and it's also where the residual and the germ-reduction claim both apply.
Let it dry undisturbed on non-porous surfaces
Both the insecticidal residual and the germ-reduction claim apply specifically to non-porous surfaces left undisturbed to dry — don't wipe treated cracks down right after spraying.
Common mistake
Believing the germ claim means the surface is now sanitized for ongoing use — the label states there's 'no residual sanitizer action,' so treat it as a one-time reduction, not lasting hygiene.
Ventilate, and keep it separate from any bait
Let the room ventilate and treated surfaces dry fully before normal use resumes.
Pro move
If you're also baiting for ants or roaches, treat spray zones and bait zones as separate territory — never overlapping.
Common mistake
Spraying near or over a gel bait or bait station — the repellent residue drives roaches and ants away from bait they'd otherwise carry back to the colony.

Habits that decide it

Do & don't

Treat cracks, crevices, and harborage — not the open floor.
Judge the insecticide and the germ claim as two separate results.
Use a real disinfectant cleaner for ongoing surface hygiene.
Keep bait and spray zones physically separate.

Don't

Don't rely on it as your household disinfectant — the label says no residual sanitizer action.
Don't fog an open room hoping to hit hidden pests.
Don't spray over or near gel bait or bait stations.
Don't treat food-prep or food-contact surfaces.

The honesty moat

Where it works vs. where it fails

No product fixes everything. This is the honest boundary — the situations it genuinely handles, and the ones it simply won't.

Where it works

A handful of visible ants or roaches need fast knockdown
A specific crack, gap, or entry point needs spot-treating on a non-porous surface
You want a one-time germ reduction on the same hard surface you're already spot-treating for pests
Occasional invaders — a stray roach, cricket, or spider — show up indoors

Where it fails

Nightly or daytime German cockroach sightings point to an established, reproducing population
An ant trail keeps returning from a colony nesting outside or in a wall void
You're expecting ongoing sanitizing power from a single application — the germ claim isn't residual
The harborage is inside a wall void or other space the spray can't physically reach

Don't throw money away

Mistakes that waste the product

Using it as a general-purpose disinfectant spray

The label is explicit: the germ claim has 'no residual sanitizer action' and the product is 'not for primary use as a sanitizer' — treating it as your kitchen cleaner leaves surfaces under-sanitized.

Fix

Use it for pest control at harborage, and use a dedicated disinfectant cleaner for actual sanitizing needs.

Fogging the room instead of treating the harborage

Wastes the can, achieves little residual value where pests actually hide, and creates unnecessary occupant exposure.

Fix

Aim the nozzle into cracks, baseboard gaps, and harborage surfaces — not into open air.

Spraying over or near a gel bait or bait station

A repellent pyrethroid residue drives foragers away from bait before they can carry it back to the colony.

Fix

Keep spray zones and bait zones physically separate — treat different areas with each tool.

Treating only the roaches or ants you can see

Independent testing on comparable pyrethroid sprays found under 20% mortality against German cockroaches on treated surfaces — the reproducing population behind the wall is untouched regardless of the germ claim.

Fix

Pair spot spraying with sanitation and, for an established roach or ant problem, a gel or liquid bait program.

Calibrated expectations

What to expect — and when

Judge the two claims on two different timelines: the pest knockdown is immediate and fading, the germ reduction is a one-time event at application.

Seconds to minutes
Direct hits on ants and roaches knock them down fast; the germ reduction on the treated non-porous surface also happens at this point.
First few days
Fewer visible pests crossing treated cracks and baseboards as the insecticidal residual keeps working — the germ effect does not renew itself.
Weeks 2-12
The insecticidal residual claim runs up to about 12 weeks on undisturbed non-porous surfaces; if roach or ant sightings continue well before that, the population is established and beyond what the can can finish.

When results plateau

Activity resumes once roaches or ants re-emerge from a wall void or outdoor colony the spray never contacted, and adding more passes for the disinfectant claim does nothing to the pest side — a rebound signals an untreated source, not an under-dosed surface.

Know the ceiling

When to stop DIY & call a pro

The added disinfectant claim changes nothing about the pest side — a contact spray still only touches insects in the open, not the colony or egg-laden harborage behind them. These are the honest signals the job has outgrown a spray:

Roach sightings continue after 2-3 weeks of correctly aimed, harborage-focused spraying
Independent testing on this class of product shows well under 20% mortality against German cockroaches on treated surfaces — an established population needs baiting or professional treatment, not more aerosol.
An ant trail keeps returning to the same spot after multiple treatments
Recurring activity points to a large colony or satellite nests the spray can't reach — only a small fraction of foragers ever cross a treated surface.
You see large black ants indoors or notice rustling or frass near moisture-damaged wood
Those point to carpenter ants nesting in structural wood — a wood-destroying pest that needs professional inspection, not a spot spray.
You're relying on the can for household sanitizing beyond the pest treatment
The label limits the germ claim to a one-time reduction on hard, non-porous, non-food-contact surfaces — it isn't a substitute for a real cleaning and disinfecting routine.

When correctly aimed spot-spraying isn't holding the line, Anchor's licensed NH technicians identify and treat the actual harborage, colony, or nest with targeted professional methods. Free inspection, same-day service across southern and central New Hampshire.

Still seeing roaches after spraying?

Get a Free inspection (603) 785-0118

Before you treat

Is it safe for pets & kids?

The short version lives here; the full per-species verdict lives on this product's pet-safety page.

This is a pyrethroid aerosol with an added phenolic disinfectant — ventilate the room during and after use, and keep kids and pets out until treated surfaces are fully dry. Never treat a suspected exposure at home.

Re-entry: Keep children and pets out of the treated area until surfaces are fully dry and the room is ventilated.

If there's an exposure, call

ASPCA Animal Poison Control: (888) 426-4435 Pet Poison Helpline: (855) 764-7661 Northern New England Poison Center: (1-800) 222-1222

See the full per-species pet-safety verdict for this product

New Hampshire context

German roaches and carpenter ants in NH homes

In southern and central New Hampshire, German cockroaches survive only inside heated structures, and carpenter ants — not fire ants or pharaoh ants, both of which are essentially absent here — are the state's dominant structural ant pest. A can like this is a fine spot tool for the odd roach behind the toaster or an ant trail on the counter, with the germ-kill claim as a minor bonus on the hard surface you treat. But nightly roach sightings or large black ants near moisture-damaged wood point to a bigger problem than any spray can solve. Anchor Pest Services treats the actual source across Manchester, Nashua, Concord, and the surrounding towns.

Service area

Southern New Hampshire

Anchor Pest Services · NH license #782664 · NEPMA member · family-owned since 2017.

Common questions

Frequently asked

Sources & further reading(6)

[1]
Safety Data Sheet — Hot Shot Ant & Roach Plus Germ Killer2 (EPA Reg. No. 9688-317-8845)
Verified actives (prallethrin 0.025%, lambda-cyhalothrin 0.010%, o-phenylphenol 0.100%), EPA registration number, listed target pests, germ-reduction claim language
manufacturerverified 2026-07-14
[2]
Gordon et al., Journal of Economic Entomology (2024) — common consumer residual insecticides vs. German cockroach
Pyrethroid liquid/aerosol sprays killed under 20% of German cockroaches exposed to treated surfaces
academicverified 2026-07-14
[3]
University of Illinois Extension — 'DIY spray and aerosol products likely to fail in German cockroach control'
Consumer pyrethroid sprays likely to fail against established German cockroach populations
extensionverified 2026-07-14
[4]
UC IPM — Cockroaches (Home & Landscape)
Insecticide sprays alone will not eliminate cockroaches; repellent residues undercut bait programs
extensionverified 2026-07-14
[5]
NPIC — Pyrethrins & Pyrethroids General Fact Sheet
Pyrethroid chemical class behavior and mode of action
npicverified 2026-07-14
[6]
UNH Cooperative Extension — Carpenter Ants Fact Sheet
Carpenter ants nest in structural wood — a call-a-pro escalation, not a contact-spray target
extensionverified 2026-07-14

Written & reviewed by

Verified

Daniel Brady

NH-Licensed Pesticide Applicator · License #782664 (NHDAMF, RSA 430)

Daniel Brady is the New Hampshire–licensed applicator behind Anchor Pest Services, a family-owned pest control company serving the Manchester area since 2017.

Verify license

Last updated July 2026

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Professional Pest Control

When a Spray Can Isn't Enough

A contact aerosol kills what it touches, but it can't end an established roach or ant colony. Anchor Pest Services treats the actual source with targeted, licensed methods across southern and central New Hampshire. Family-owned since 2017, NH license #782664.

Get a Free inspection (603) 785-0118

Targeted source treatment, not just spot spraying
NH-licensed applicators (#782664)
Free inspection — same-day service across southern NH

NH License #782664 · No obligation · We answer in person

Keep Exploring

How to Use Ant & Roach Plus Germ Killer Spray by Hot Shot

Does this product actually work?

What it is — and what it's really for

The technique walkthrough

Identify the harborage, not just the bug

Shake well and hold the can correctly

Treat the crack, not the room

Let it dry undisturbed on non-porous surfaces

Ventilate, and keep it separate from any bait