You can use heat, desiccant dusts, chemical sprays, steam, and certain botanical products to kill bed bugs. No single method works perfectly on its own, and the most effective approach combines several of these tools at once. Here’s what actually works, how well each option performs, and what to skip.
Heat: The Most Reliable Kill Method
Heat is one of the few treatments that kills every life stage of bed bugs, including eggs, which are notoriously hard to destroy. Adult bed bugs die at about 119°F (48.3°C), but eggs are tougher and require temperatures around 131°F (54.8°C) for guaranteed kill. If temperatures fall short of those thresholds, exposure time matters a lot. At 113°F, adults need roughly 95 minutes of sustained exposure to reach 99% mortality, while eggs can survive over seven hours at that same temperature.
Professional whole-room heat treatments work by raising the temperature of an entire space above lethal levels and holding it there for hours. This is one of the more effective single-visit options, typically costing $1 to $3 per square foot. The key limitation is that heat doesn’t leave any residual protection, so if bed bugs are reintroduced afterward, there’s nothing preventing a new infestation.
For clothing and bedding, your household dryer on high heat for 30 minutes kills bed bugs across all life stages. Washing alone generally won’t do it. Bag up infested fabrics, dump them directly into the dryer, and run a full high-heat cycle before washing.
Steam Treatment for Furniture and Mattresses
A steam cleaner lets you target bed bugs hiding in mattress seams, box springs, baseboards, and upholstered furniture. Commercial bed bug steamers produce superheated dry steam at tip temperatures around 356°F, which kills adults and eggs on contact through thermal shock. The “dry” part matters because it leaves surfaces mostly moisture-free, reducing the risk of mold or damage to furniture.
For steam to work, you need to move the nozzle slowly across every surface, about one inch per second. Bed bugs hiding deep inside thick cushions or wall cavities may not get enough sustained heat, so steam works best on accessible surfaces and as a complement to other methods.
Desiccant Dusts: Slow but Effective
Desiccant dusts kill bed bugs by destroying the waxy coating on their exoskeleton, causing them to dehydrate. The two main options are diatomaceous earth and silica gel (silicon dioxide). Both are registered by the EPA for bed bug use, and because they kill through a physical mechanism rather than a chemical one, bed bugs can’t develop resistance to them.
Not all desiccant products are equal, though. A 2024 study comparing multiple brands found dramatic differences in effectiveness. Professional-grade silica gel achieved 100% mortality within one to two days of continuous exposure, while professional-grade diatomaceous earth reached full kill within two to four days. Consumer-grade diatomaceous earth from supermarkets, however, killed fewer than 30% of bed bugs even after 10 days. The difference comes down to particle structure and quality. If you’re buying diatomaceous earth, look for products specifically marketed for pest control rather than general-purpose brands sold as litter additives or garden products.
Even brief contact with silica gel proved potent. After just 10 minutes of exposure, silica gel still achieved 100% mortality within 10 days. It also transferred effectively from treated bugs to untreated ones, meaning bugs that walk through the dust can spread it back to others hiding in crevices. Apply desiccant dusts lightly in cracks, crevices, behind outlet covers, and along baseboards. A thin, barely visible layer works best. Heavy clumping actually reduces effectiveness because bugs walk around it.
Chemical Sprays and Insecticides
The EPA has registered over 300 products across seven chemical classes for bed bug control. The most common are pyrethrins and pyrethroids, which are the active ingredients in many store-bought bed bug sprays. These work as contact killers and can provide some residual protection on treated surfaces.
The problem is resistance. Pyrethroid resistance is now widespread in bed bug populations across developed countries, and more recent reports show resistance emerging to newer chemical combinations that pair pyrethroids with neonicotinoids. This means the spray you grab off the shelf may have limited effectiveness against the bugs in your home.
Pyrrole-based insecticides work through a different mechanism that disrupts energy production in cells, and bed bugs haven’t yet shown widespread resistance to this class. These products are typically available only through professional pest control services. Professional chemical treatments generally cost $2 to $5 per square foot, or roughly $270 to $775 per room.
Cold-pressed neem oil is the only EPA-registered biochemical option for bed bugs. It works as a contact killer but has limited residual activity.
Botanical and Natural Sprays
Most essential oil-based bed bug products perform poorly, but a few stand out. A study in the Journal of Economic Entomology tested 11 nonsynthetic insecticides and found that only two caused more than 90% mortality: one containing geraniol and cedar extract, and another containing clove oil and peppermint oil. Both reached near-total kill rates within 10 days, comparable to a synthetic professional-grade insecticide.
The geraniol and cedar extract product also killed 87% of bed bug eggs on direct spray, while the other botanical products had almost no effect on eggs. Cedar oil on its own, diluted in water, killed only about 22% of bed bugs in separate testing. The takeaway: specific formulations matter far more than the individual essential oil. A bottle of pure peppermint oil from the store is not a bed bug treatment.
Even the best-performing botanical sprays kill more slowly than synthetic chemicals. They can work as part of a broader strategy, especially if you want to reduce chemical exposure in sleeping areas, but they won’t solve an infestation alone.
Encasements and Physical Barriers
Mattress and box spring encasements are zippered covers that trap bed bugs already inside and prevent new ones from getting in. They don’t kill bugs on their own, but trapped bugs eventually starve. Bed bugs can survive months without feeding, so encasements need to stay on for at least a year to be effective as a standalone trapping method. Their real value is eliminating the deepest, hardest-to-treat hiding spots in your bed.
Interceptor traps placed under bed legs catch bugs trying to climb up to reach you. These serve double duty as monitoring tools, letting you gauge how active the infestation is and whether your treatments are working.
Combining Methods for Best Results
Integrated pest management, combining multiple approaches, consistently outperforms any single treatment. A practical combination for a DIY approach looks like this: wash and dry all fabrics on high heat, apply professional-grade silica gel dust into cracks and crevices, use steam on mattress seams and furniture joints, install mattress encasements, and set up interceptor traps under bed legs. Vacuum thoroughly and often, disposing of the vacuum bag in a sealed plastic bag outside your home.
For moderate to heavy infestations, professional treatment is worth the cost. Professionals have access to whole-room heat equipment and chemical classes that aren’t available retail. They can also identify hiding spots you’d miss. Chemical treatments from professionals typically run $270 to $775 per room, while heat treatments cost $1 to $3 per square foot.
Whatever products you use, read every label completely. The EPA specifically warns that even seemingly harmless treatments can cause serious harm if misapplied indoors. Never use outdoor pesticides inside, never apply more product than directed, and follow all ventilation and re-entry instructions on the label.