You can get rid of bed bugs in a mattress using a combination of heat, vacuuming, desiccant dusts, and encasements. No single method works alone, and skipping steps leaves survivors that repopulate within weeks. The good news: in most cases, you can save the mattress rather than throw it away.
Start by Vacuuming Every Seam and Tuft
Vacuuming physically removes live bugs, nymphs, and eggs from the mattress surface before you apply other treatments. Focus on seams, tufts, piping, handles, and any folds where the fabric creates a crevice. Use a crevice tool attachment to push into tight spots and dislodge bugs from their hiding places.
The tricky part is what happens after you vacuum. Live bed bugs can survive inside your vacuum and crawl back out. To prevent this, place a knee-high stocking inside the vacuum hose before you start. Slide the closed end into the hose, fold the open end over the hose opening, and secure it with a rubber band. Then insert the crevice tool through the stocking into the hose. When you finish, carefully pull out the stocking, tie the open end shut, seal it in a zippered plastic bag, and throw it in an outdoor trash can immediately.
If you skip the stocking method, store the entire vacuum (all parts included) inside a large sealed plastic bag between uses. Otherwise you risk releasing captured bugs back into your home.
Use Steam to Kill Bugs Deep in the Mattress
Bed bugs die within 20 minutes at 118°F and almost instantly at higher temperatures. A garment steamer or commercial steam cleaner produces temperatures well above that threshold, making it one of the most effective tools for treating a mattress. The target surface temperature is 160 to 180°F.
Move the steamer head slowly, about 12 inches every 30 seconds, across every inch of the mattress surface. Pay extra attention to seams, edges, and the underside. Speed is the most common mistake: moving too fast means the heat doesn’t penetrate deep enough to reach bugs hiding inside fabric layers. Work methodically in rows so you don’t miss any section.
Eggs are harder to kill than adults. While adult bed bugs die at 118°F in 20 minutes, eggs require 90 minutes of sustained exposure at that same temperature to reach full mortality. The intense heat from steam (well above 118°F) shortens this considerably, but it reinforces why slow, thorough passes matter. You need the heat to soak into the material, not just glance across the surface.
Apply Desiccant Dust to Seams and Crevices
Desiccant dusts work by destroying the waxy coating on a bed bug’s outer shell, causing it to dry out and die. Two types are commonly used: diatomaceous earth, which scratches the coating, and silica gel, which adheres to the shell and absorbs the coating directly. There is evidence that silica gel performs better because of how it bonds to the insect rather than simply scratching it.
Apply a very thin, barely visible layer along mattress seams, folds, and the underside of the box spring. This is critical: heavy application actually repels bed bugs, making the dust less effective. You want a light film, not visible piles. Check the product label to confirm it’s approved for use on mattresses and box springs, and wear a dust mask and gloves during application.
These dusts have a major advantage over liquid sprays. When applied in dry areas, they remain effective far longer than most liquid insecticides. Dust picked up by one bug can also transfer to others in the same hiding spot, extending its reach. However, the dust clumps in humid conditions and loses effectiveness, so keep the area as dry as possible. Recently fed nymphs or bugs that molt shortly after exposure may survive, which is why desiccant dust works best as one layer of a multi-step approach.
Seal the Mattress in an Encasement
After vacuuming, steaming, and applying dust, zip the mattress into a bed bug encasement. Do the same for the box spring. These are specially designed covers that seal the entire mattress with a zipper, trapping any surviving bugs inside where they cannot escape or feed.
Starved bed bugs held at room temperature die within about 70 days on average. Older studies from the 1930s and 1940s claimed bed bugs could survive over a year without feeding, but modern research on bed bugs found in U.S. homes shows that figure was inflated by the cold, unheated European buildings where those studies took place. At normal indoor temperatures, 70 days is the realistic ceiling.
Once the encasement is on, leave it on permanently. You can wash your sheets, pillowcases, and other bedding normally, but the encasement stays sealed. Removing it early, even months later, risks releasing any bugs that are still alive inside. The encasement also serves a second purpose: with the smooth, sealed surface, bed bugs have nowhere to hide on the outside of the mattress, making future inspections far easier.
Freeze Small Items, but Not the Mattress
Freezing works for smaller items like pillows, stuffed animals, or shoes that may have come in contact with an infested mattress. Place items in a freezer set to 0°F or below and leave them for at least four days. The center of the item must reach 0°F for the clock to start, so bulky items need extra time. Temperatures warmer than 0°F may not kill eggs and small nymphs.
A mattress is too large and insulated to freeze effectively in a home freezer, so this method is best reserved for the surrounding items you’d like to save.
What Not to Spray on Your Mattress
Never apply a pesticide to your mattress unless the product label specifically says it’s safe for that use. The CDC has documented cases of illness from misuse, including an infant who developed vomiting and diarrhea after being placed on a mattress treated with an improperly used indoor insecticide. Many common bug sprays are not formulated for surfaces where you sleep, and using them there creates a direct exposure risk.
If you do use a pesticide, check the EPA’s list of products approved specifically for indoor bed bug use and follow the label instructions exactly. For mattress surfaces specifically, desiccant dusts labeled for that purpose are a safer alternative to liquid sprays because they contain no synthetic active ingredients like pyrethroids or neonicotinoids.
When to Save the Mattress and When to Toss It
Most infested mattresses can be treated and saved. Bed bugs live on and near the surface of the mattress, not deep inside the padding, which means vacuuming, steam, dust, and encasements can address the vast majority of infestations. Throwing out a mattress is expensive and, on its own, doesn’t solve the problem since bed bugs also live in the bed frame, headboard, baseboards, and nearby furniture.
That said, a mattress that is heavily infested, torn, or structurally damaged may not be worth the effort. If the fabric is ripped in ways that let bugs burrow deep inside where steam and vacuum tools can’t reach, or if the mattress was already near the end of its life, disposal makes sense. If you do discard it, slash or deface the mattress so no one picks it up from the curb and brings the infestation into their home.
Putting It All Together
The most effective approach layers these methods in sequence. Vacuum first to remove the bulk of visible bugs. Steam the entire mattress surface slowly and thoroughly. Apply a thin coat of desiccant dust to seams and crevices. Then seal everything inside a quality encasement and leave it zipped. Wash all bedding, sheets, and pillowcases in hot water and dry on high heat.
Repeat the vacuuming and steaming weekly for at least three to four weeks. Bed bug eggs hatch in roughly 6 to 10 days, so repeat treatments catch newly emerged nymphs before they mature and reproduce. A single round of treatment almost never eliminates an infestation completely. If you’re still finding live bugs after a month of consistent effort, a professional exterminator with whole-room heat treatment equipment can raise the temperature of your entire space above lethal levels in a way that home tools cannot match.