How do I use a No-Pest Strip correctly?

First confirm the space qualifies — enclosed and occupied less than about four hours a day, such as a garage, attic, crawl space, or shed, or a larger structure like a cabin that will sit unoccupied for months. Remove the strip from its pouch only when ready to hang, size it to the room's cubic footage, and hang it in an open area away from airflow and out of reach of children and pets. Keep the space closed so the vapor can accumulate, record the hang date, and replace it after about four months.

Does the No-Pest Strip actually work?

In the space it's actually labeled for — a sealed, low-occupancy room — yes, and it works better than a surface spray for that specific job, because the continuous vapor reaches insects throughout the enclosed volume rather than just where you sprayed. It fails, by design and by label, anywhere it's used outside that scope: an occupied bedroom, kitchen, or living room. The honest verdict isn't about the chemistry working; it's about matching the space to what the label allows.

Why do I still see insects even with the strip hung?

If the space isn't truly sealed — a gap under a door, an open window, active airflow — the vapor never builds to an effective concentration, so insects passing through or entering from outside won't be controlled. It's also possible the strip is undersized for the room's actual cubic footage, or insects are breeding faster than the vapor is controlling them from an unaddressed entry point or organic source. In a properly sealed, correctly sized space, persistent activity after a full strip cycle is a sign of a source the strip alone can't fix.

Can I use this in my kitchen or bedroom to get rid of flies or gnats?

No — the label explicitly prohibits this. Hot Shot's own directions state the strip is for use in unoccupied areas and not for use in homes except garages, attics, crawl spaces, and sheds occupied less than four hours a day, and it separately bars kitchens, restaurants, food-prep areas, and hospital or clinic rooms. This isn't an overcautious suggestion — CDC and state health investigators have documented real illness cases, including headaches, nausea, and respiratory irritation, from people using DDVP pest strips in occupied living spaces.

How is this different from spraying an aerosol like Raid or Ortho?

Completely different mechanism and rules. A contact aerosol is a wet spray you aim at a surface, crack, or visible insect for knockdown, with light-to-moderate residual on the surfaces you actually treat. This strip is a solid resin that continuously releases an insecticidal vapor into the air of a sealed space for months — it isn't sprayed or wetted onto anything, and it works by fumigating the whole enclosed volume rather than treating specific surfaces. That's exactly why its use is restricted to unoccupied or low-occupancy spaces, unlike a spray you can use, ventilate, and re-enter the same day.

Is it safe to use around my pets?

Only in the enclosed, low-occupancy spaces the label allows, and even then it should be hung well out of reach — this is an organophosphate that the label states may be fatal if swallowed and is harmful if inhaled. Keep pets (and children) out of any space where a strip is hung, and never use one in a room where a pet spends significant time, such as a laundry room a cat uses daily. For the full per-species pet-safety verdict on this product, see the companion review at /is-pest-control-safe-for-pets/no-pest-strip-insect-killer-by-hot-shot.

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

How to Use No-Pest Strip Insect Killer by Hot Shot

Situational

Dichlorvos (DDVP) 18.6%

A No-Pest Strip is not a spray — it's a resin strip that continuously releases dichlorvos (DDVP) vapor to fumigate an enclosed space over months, and that single fact drives everything about how to use it correctly. Hot Shot's own label restricts it to unoccupied areas, stating it's not for use in homes except garages, attics, crawl spaces, and sheds occupied less than four hours a day, and it bars kitchens, food-prep areas, and medical rooms entirely. Used in a qualifying enclosed, low-occupancy space and sized to the room's cubic footage, it reliably controls flying and crawling insects for up to about four months. Hung in a bedroom or living room, it's both a violation of the label and a real health risk — CDC and Washington State health investigators have documented illness cases directly tied to using these strips in occupied rooms. Confirm your space qualifies before you open the pouch, and if the insect problem is in a space you actually live in, this isn't the right product.

At a glance

Efficacy: Situational
Best job: Continuously fumigating a sealed, low-occupancy space — a detached garage, shed, or crawl space — over months
Format: Resin strip that continuously releases an insecticidal vapor — a fumigant, NOT a spray-and-dry aerosol; one strip treats roughly 900-1,200 cubic feet of enclosed space
Technique: Finicky technique

The honest verdict

Does this product actually work?

The verdict on this product

SituationalFinicky technique

Situational

Effective, but only where the label actually allows it — a truly enclosed, unoccupied space. It is not a general-purpose room deodorizer for bugs.

As a fumigant for a sealed, unoccupied volume, this strip genuinely works: the continuous vapor reaches hidden insects across the enclosed space in a way a surface spray never could, and it keeps working for months. But that same pervasive vapor is precisely why the label restricts it to enclosed, low-occupancy spaces — used in a bedroom, kitchen, or regular living room, it's both a label violation and a documented, if uncommon, cause of real illness. The honest verdict depends entirely on matching the space to the label, not on the product's chemistry.

Best for

Killing flying and crawling insects continuously in a closed, low-occupancy space like a detached shed, garage, or closed-up cabin.

Skip it for

Any occupied living area, kitchen, or space used more than about four hours a day — the label prohibits this, and regulators have documented illness from exactly this misuse.

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

Resin strip that continuously releases an insecticidal vapor — a fumigant, NOT a spray-and-dry aerosol; one strip treats roughly 900-1,200 cubic feet of enclosed space

Indoor / outdoor

indoor

Residual

Releases an effective vapor continuously for up to about four months per strip, then needs replacing

Target pests

Flies, Mosquitoes, Gnats, Moths, Cockroaches, Silverfish, Spiders

Best job

Continuously fumigating a sealed, low-occupancy space — a detached garage, shed, or crawl space — over months

Active ingredient

Dichlorvos (DDVP) (18.6%)

Not for (honest)

Occupied living areas, kitchens, food-prep or medical spaces, or anywhere used more than about four hours a day — the label restricts this by design, not by convenience

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.

Finicky technique~5 min to hang; vapor builds over hours and works continuously for up to about four monthsTools:A hook or hanger, Gloves (to avoid unnecessary handling), A way to record the hang date

The whole technique here is qualifying the space before you hang anything — this strip is easy to hang and finicky to use within the label's rules.

Confirm the space actually qualifies
Check that the space is enclosed and occupied less than about four hours a day — a garage, attic, crawl space, or shed — or, for larger structures like cabins or boats, unoccupied for months at a stretch.
Common mistake
Hanging a strip in a bedroom, home office, or living room because 'it's just a strip' — those are label violations regardless of how the room is used.
Remove the strip from its pouch only when ready
The strip starts releasing vapor as soon as it's unsealed, so don't open it until you're ready to hang it.
Size the strip to the room
Match the strip to the enclosed cubic footage it's rated for — an open, drafty, or oversized space won't let the vapor build to an effective concentration.
Pro move
Seal obvious gaps (a propped door, a broken window) in the target space first — the fumigant only works if the vapor actually accumulates.
Hang it out of reach, then close the space
Hang the strip in an open area of the room, away from windows and airflow, and out of reach of children and pets. Keep the space closed so vapor accumulates.
Caution
May be fatal if swallowed and harmful if inhaled — hang it where no one will handle or mouth it.
Record the date and replace on schedule
Note when you hung it and replace after about four months. If you ever need to re-enter for extended work, ventilate the space first.
Common mistake
Leaving a strip well past its labeled life — effectiveness declines and you lose track of whether the room is still being treated.

Habits that decide it

Do & don't

Use only in enclosed spaces occupied less than about four hours a day
Match the strip to the room's cubic footage
Hang it out of reach of children and pets, away from airflow
Ventilate before extended re-entry and replace on the labeled schedule

Don't

Don't use in bedrooms, kitchens, living rooms, or any regularly occupied space
Don't use in food-prep, food-handling, or medical/clinic rooms
Don't hang it in an open or drafty area where vapor can't accumulate
Don't handle the strip more than necessary or leave it past four months

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

The space is genuinely enclosed and occupied less than about four hours a day — a detached garage, attic, crawl space, or shed
A closed-up seasonal cabin, boat, or similar structure will sit unoccupied for months
You need continuous control of flying or crawling insects across a sealed volume, not a one-time knockdown
The strip is sized correctly to the enclosed cubic footage

Where it fails

The space is a regularly occupied living area — bedroom, kitchen, living room, or home office
The room is open, drafty, or ventilated, so vapor never builds to an effective level
It's used like a knockdown spray for an immediate infestation rather than a slow, continuous fumigant
Occupancy exceeds roughly four hours a day in the treated space

Don't throw money away

Mistakes that waste the product

Using it in a living space

This is both a label violation and a documented health risk — CDC investigators identified dozens of acute illness cases directly tied to using DDVP pest strips in occupied kitchens and bedrooms.

Fix

Restrict use strictly to enclosed spaces occupied less than about four hours a day.

Hanging it in an open or ventilated area

The fumigant depends on vapor accumulating in a sealed volume — an open or drafty space never reaches an effective concentration, so the strip does little.

Fix

Seal the target space and confirm it can hold the vapor before hanging the strip.

Sizing it wrong for the room

A strip rated for roughly 900-1,200 cubic feet under-treats a larger enclosed space, leaving parts of it uncontrolled.

Fix

Match the strip (or multiple strips) to the actual cubic footage of the qualifying space.

Leaving it hung well past four months

Effectiveness declines as the resin depletes, and an old, forgotten strip gives a false sense of ongoing protection.

Fix

Record the hang date and replace on the labeled interval.

Calibrated expectations

What to expect — and when

This is a slow-building, long-duration fumigant — judge it on continuous control over months in a qualifying space, not on instant knockdown.

First few hours
Vapor begins accumulating in the sealed space as the strip releases dichlorvos continuously.
Days to weeks
Insects entering or present in the enclosed space are controlled as the vapor concentration builds and holds.
Up to about four months
Continuous control in a properly sized, sealed, low-occupancy space; effectiveness fades toward the end of that window and the strip needs replacing.

When results plateau

There's no 'plateau' in a qualifying space — the strip either works continuously because the room is sealed and low-occupancy, or it fails immediately because the space is open, ventilated, or regularly occupied and the label restricts its use there entirely.

Know the ceiling

When to stop DIY & call a pro

This strip has a narrow, label-defined job. These are the honest signals it's the wrong tool — or that DIY has hit its ceiling:

The insect problem is in a room you actually live, sleep, cook, or work in
The label bars occupied living spaces outright — this product structurally cannot be the fix there, regardless of the infestation.
You need to treat a kitchen, food-prep, or food-storage area
The label prohibits use in food-handling areas; a different, correctly labeled approach is needed.
Flying or crawling insects persist even in a qualifying enclosed space after a full strip cycle
Persistent activity despite continuous fumigation suggests an entry point or breeding source the strip can't address.
Anyone in the household reports headache, nausea, or respiratory irritation after using a strip
Those are documented early symptoms of organophosphate vapor exposure — stop use immediately and seek medical guidance, don't troubleshoot placement yourself.

When the pest problem is somewhere you actually live, or DIY fumigant use has hit its label-defined limits, Anchor's licensed NH technicians use targeted, occupant-safe professional methods instead. Free inspection, same-day service across southern and central New Hampshire.

Pest problem in a room you actually live in?

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 an organophosphate fumigant that may be fatal if swallowed and is harmful if inhaled. It is restricted to enclosed, unoccupied or low-occupancy spaces — keep it out of reach of children and pets, and ventilate a treated space before extended re-entry.

Re-entry: Never use in a regularly occupied living area; ventilate the treated space thoroughly before extended re-entry.

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

Where a No-Pest Strip actually fits in a NH home

In southern and central New Hampshire, the qualifying spaces for this strip are usually a detached garage, an unheated shed, a crawl space, or a cabin or camp closed up for the off-season — not the finished, heated living areas where most NH pest complaints (German cockroaches, mice, occasional invaders) actually happen. If your insect problem is in a room your family uses, this product isn't the fix regardless of how well it's applied. Anchor Pest Services treats occupied-space pest problems with methods actually labeled for them, 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(5)

[1]
Hot Shot No-Pest Strip₂ — Safety Data Sheet (Reg. No. 5481-532-8845)
Verified active (dichlorvos/DDVP 18.6%), continuous-vapor strip format, occupancy restrictions, four-month effective life
manufacturerverified 2026-07-14
[2]
Hot Shot — No-Pest Strip product page
Product format and labeled use description (facts only)
manufacturerverified 2026-07-14
[3]
CDC MMWR — 'Notes from the Field: Acute Illness Associated with Use of Pest Strips — Seven U.S. States and Canada, 2000-2013'
31 documented acute DDVP pest-strip illness cases, mostly from use in occupied living areas in violation of the label
govverified 2026-07-14
[4]
Washington State Department of Health — 'Pest Strips with Dichlorvos'
State-documented illness cases and symptoms from pest-strip misuse in occupied spaces
govverified 2026-07-14
[5]
University of Florida IFAS Extension — 'Pest Strips: You Have to Read the Fine Print' (PI262)
Occupancy restriction framing and correct-use guidance for DDVP pest strips
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 the Right Tool Isn't a Fumigant Strip

This product does one narrow job well — an enclosed, unoccupied space — and nothing safely beyond it. Anchor Pest Services treats occupied-home pest problems with targeted, licensed methods across southern and central New Hampshire. Family-owned since 2017, NH license #782664.

Get a Free inspection (603) 785-0118

Occupant-safe, targeted treatment methods
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 No-Pest Strip Insect Killer by Hot Shot

Does this product actually work?

What it is — and what it's really for

The technique walkthrough

Confirm the space actually qualifies

Remove the strip from its pouch only when ready

Size the strip to the room

Hang it out of reach, then close the space

Record the date and replace on schedule