Treatment

What actually works against bed bugs

You're being marketed a hundred bed bug products. We don't sell any of them, so we can be honest. Where possible we cite the Rutgers Wang Lab experimental series (Mark Rober video shows the data directly), the lab tested representative products under controlled conditions and measured mortality at 10 days.

Heat (whole-room thermal remediation or chamber)

Works

The only purely physical method bed bugs can't develop resistance to. Direct contact with 50°C (122°F) kills every life stage in seconds. The hours-long treatment duration is not because killing takes hours, but because the heat has to penetrate insulating materials (mattress core, suitcase interior, padded furniture). Works as whole-room professional treatment or single-item heat chamber. Detail: bed bug heat treatment.

Food-grade diatomaceous earth

Works with caveats

~90% mortality after 10 days in the Rutgers experiments, the best DIY result of anything tested. Mechanism is mechanical: the silica grains abrade the bug's wax coating; the bug dies of dehydration in hours to days. No chemistry, no resistance pathway. Bugs also transport DE back to the aggregate, spreading exposure.

Safety, briefly

  • Use food-grade only (amorphous silica). Pool/filter-grade contains crystalline silica, a lung hazard.
  • FFP2/N95 mask when applying, ventilate afterward.
  • Apply as a thin invisible dust, visible piles let bugs walk around. If you can see the powder, it's too much.
  • Avoid in homes with crawling infants, pets or anyone with lung disease.

Hardware-store pyrethroid sprays

Partial

Pyrethroids (tetramethrin, cypermethrin and friends) are the common active ingredient in "kills bed bugs" sprays. They work if the bug touches the spray directly. Three big problems:

  • Most populations have evolved resistance to common pyrethroids, the spray then does nothing.
  • Eggs survive sprays, generally.
  • Repellent effect: survivors flee into wall voids and adjacent rooms, spreading the infestation.

⚠ Watch: repellent effect

The biggest problem with DIY sprays isn't that they fail. it's that they actively worsen the infestation. Survivors, scared by the smell, escape into deeper hideouts: brick voids, behind baseboards, under the floor, even into neighboring apartments via cable risers. What was a localized bed-side colony becomes a building-wide problem. Professional treatment afterward takes longer, costs more, and may need multiple visits.

If at all possible: no insecticide spray for bed bugs, even if the label says "for bed bugs".

In Rutgers' direct experiments, the three commercial sprays killed about 12% of bed bugs at 10 days. statistically identical to a water control. Direct-spray contact bumped some to ~50%, but you only ever see a fraction of the population, so this isn't elimination.

Bug bombs / foggers

Counterproductive

Pressurized cans that fill a room with insecticide mist. Strong marketing, terrible in practice for bed bugs: the mist only reaches exposed surfaces, not the cracks and crevices where bugs hide. Survivors disperse deeper into wall voids and adjacent units. Pest professionals unanimously advise against.

Ultrasonic pest repellers

Hype

In the Rutgers experiment, the ultrasonic device's dish collected more bed bugs (120) than the control dish (101). They have no measurable repellent effect. They also don't make sense biologically, bed bugs don't have ears. Save your money.

Dryer sheets, mothballs, baking soda, essential oils

Hype

In the Rutgers tests, the dishes around these items caught an average of ~4 bed bugs vs ~26 in the control. So bed bugs prefer to avoid the smell, but the avoidance is temporary annoyance, not death. As soon as the bug is hungry, it walks through. None of these kill bed bugs.

Encasements + interceptors + steam (combined)

Works

Not a single product but the combined DIY protocol from Wang Lab. Mattress and box-spring encasements seal in anything that's already there, eliminate harborage geometry, and starve out trapped bugs over 12-18 months. Interceptors under each bed leg block climbing and provide weekly monitoring data. Handheld steam at ~100°C kills surface bugs and eggs along seams. Combined with weekly hot wash and dryer treatment, this is the protocol that actually works without an exterminator. Detail: DIY treatment.

Professional treatments

Works

Three professional approaches in declining order of reliability: whole-room thermal remediation (gold standard, ~$1,500-4,000), multi-pass targeted insecticide with a registered active ingredient (cheaper but multi-visit and relies on no resistance), and fumigation (rarely used for residential, very effective when done). For an established infestation in a multi-unit building, professional is the right call. See professional heat treatment.

Sources

Spot an error?

This page is actively updated based on reader feedback.

If you found something wrong, a misread of a study, a number that doesn't match current data, an outdated source link, a missing nuance, tell us. You help every later reader by flagging it. For genuinely substantive finds we'll add you to the source list with credit, if you want.

Send feedback · feedback@bedbugmanual.org →

Related articles

Treatment

Bed bug heat treatment: temperatures, methods, what actually works

Bed bugs and their eggs die at 50°C (122°F), instantly on direct contact, in minutes through fabric, in hours through dense materials. The four practical heat methods (chamber, dryer, steamer, whole-room professional) and where each is the right call.

Read →

Treatment

DIY bed bug treatment without making it worse: sprays, home remedies, heat

Most off-the-shelf sprays match a water control in mortality (Rutgers experimental data). What goes wrong with DIY and how to do it right when you commit: the 8-step protocol from Wang Lab that actually works without an exterminator.

Read →

Treatment

Washing bed bugs out of clothes: which temperature actually kills them?

60°C (140°F) works, if the load is half-full and the main cycle is long enough. The dryer is often more effective than the wash. What to do with wool, silk, function fabrics that can't take heat.

Read →

All articles