Bed bugs hide during the day and emerge primarily in response to three signals: carbon dioxide from your breathing, body heat, and certain chemicals your skin releases. To draw them out, you need to either mimic those signals or physically disturb their hiding spots. The approach you choose depends on whether you’re trying to confirm an infestation or flush bugs out for treatment.
Where Bed Bugs Hide
Before trying to lure bed bugs out, it helps to know where they’re likely hiding. Bed bugs can squeeze into any crack wide enough to fit a credit card. Their favorite spots are close to where you sleep: the piping, seams, and tags of your mattress and box spring, plus cracks in the bed frame and headboard.
In heavier infestations, they spread further. The EPA lists these common secondary hiding spots:
- Seams of chairs and couches, between cushions, and in curtain folds
- Drawer joints in dressers and nightstands
- Electrical outlets and appliances
- Under loose wallpaper and behind wall hangings
- Where the wall meets the ceiling
- Inside the head of a screw
Knowing these locations lets you target your efforts rather than hoping bugs wander into the open on their own.
Use Carbon Dioxide as a Lure
Carbon dioxide is the single strongest attractant for bed bugs, more effective than heat alone. It mimics the exhaled breath of a sleeping person, which is the primary signal bed bugs use to locate a host. Research from Rutgers University confirms that adding a CO2 source to a trap dramatically improves detection rates.
The simplest way to generate CO2 at home is with dry ice. A small cooler or insulated container with a few pounds of dry ice, placed near the bed or sofa, will release CO2 gas as it sublimates at room temperature. Researchers found that dry ice releases CO2 at roughly 397 milliliters per minute, which is enough to attract bed bugs from across a room. Place a pitfall-style trap underneath or beside the dry ice source to catch bugs as they approach.
If you can’t get dry ice, a sugar-yeast mixture works nearly as well. Dissolving sugar in warm water with active dry yeast produces CO2 through fermentation. In studies of naturally infested apartments, sugar-yeast monitors performed equally well as dry ice monitors during the first eight hours after activation. You’ll want to use a container with a narrow opening to direct the gas flow and replace the mixture daily, since production drops off after several hours.
Add Chemical Lures for Better Results
CO2 alone will attract bed bugs, but pairing it with chemical lures that mimic human skin odor significantly increases the number of bugs you draw out. Research at Ohio State University found that a blend of chemical lures combined with CO2 caught more bed bugs than CO2 by itself. Interestingly, adding heat on top of CO2 did not meaningfully improve results, suggesting that once you have the CO2 signal, chemical cues matter more than warmth.
The compounds that work best include lactic acid (found in human sweat), a mushroom-like alcohol called 1-octen-3-ol, and certain plant-derived oils like spearmint and coriander. You don’t need to source these individually. Several commercial bed bug monitors, sometimes called “active monitors,” come preloaded with these lure blends. They’re designed to be placed near beds or furniture and left overnight.
Set Interceptor Traps on Furniture Legs
Interceptor traps are shallow, two-walled dishes that sit under the legs of your bed or couch. Bed bugs climbing up or down the furniture legs fall into the trap’s moat and can’t escape because the inner walls are too smooth and slippery. This is a passive method, meaning it doesn’t actively lure bugs, but it catches them during their normal nightly travel patterns.
To set them up properly, place one trap under each leg of the furniture. Pull the bed or sofa a few inches away from walls and other furniture so the legs are the only route bugs can take. Make sure bedding isn’t touching the floor, walls, or anything adjacent, since that gives bugs an alternate path. On carpeted floors, place a square of tile or plywood under each trap so the carpet doesn’t collapse under the furniture’s weight and crack the trap.
Interceptors won’t force bugs out of hiding on a specific night, but they’ll catch bugs over the course of their normal feeding cycle. Adult bed bugs typically feed every five to seven days when a host is available, so leaving interceptors in place for at least one to two weeks gives you a realistic window to detect activity.
Use Pyrethrin-Based Flushing Sprays
If you want bugs to scatter out of a known hiding spot right now, pyrethrin-based sprays act as flushing agents. Pyrethrins are natural insecticides derived from chrysanthemum flowers, and they irritate bed bugs on contact, driving them out of cracks and crevices. The EPA notes that pyrethrins and their synthetic cousins (pyrethroids) are the most common compounds used for indoor bed bug control.
There’s a catch. Many bed bug populations have developed resistance to these chemicals. In resistant strains, a flushing spray may cause bugs to scatter to new hiding spots rather than dying. This can actually spread an infestation if you’re not prepared to intercept or kill the bugs once they emerge. Flushing sprays work best when combined with interceptor traps or when a pest professional is using them as part of a broader treatment plan.
Apply Targeted Heat
Bed bugs are sensitive to heat and will move away from surfaces that reach lethal temperatures. A handheld steamer directed into cracks, seams, and crevices forces bugs to flee or die in place. Virginia Tech recommends maintaining a surface temperature between 160 and 180°F, moving the steamer nozzle at a pace of about 12 inches every 30 seconds. Going faster than that won’t sustain enough heat to be effective.
Steam works well on mattress seams, bed frames, baseboards, and upholstered furniture. It kills bugs and eggs on contact when the temperature is high enough, but it also drives bugs deeper into hiding if applied too quickly or from too far away. Keep the nozzle close to the surface and move methodically. A towel wrapped around the nozzle tip can help concentrate the steam into tight gaps.
Sleep in the Room
This sounds counterintuitive, but one of the most effective ways to draw bed bugs out is simply to sleep in the infested room. Your body produces exactly what bed bugs are searching for: CO2 from breathing, warmth, and skin chemicals. Bed bugs that haven’t fed in days or weeks will emerge when they detect a host nearby.
Leaving the room empty doesn’t starve them out quickly. Adult bed bugs can survive several months without feeding under normal household conditions, and in cooler laboratory environments, some have lasted over 400 days. Abandoning a bedroom often just delays the problem or pushes bugs into adjacent rooms as they search for a host. Sleeping in the room, especially with interceptor traps on the bed legs, turns your presence into the lure and the traps into the detection system.
Timing and Darkness Matter
Bed bugs are most active in the hours before dawn, roughly between 2 a.m. and 5 a.m. They strongly prefer darkness and are less likely to emerge under bright lights. If you’re setting traps or applying lures, activate them in the evening and check results in the morning. Turning off all lights in the room improves your chances.
For the best detection results, combine multiple methods. Set interceptor traps on the bed legs, place a CO2 source nearby, and sleep in the room with the lights off. This layered approach mimics a sleeping human so convincingly that even cautious, well-hidden bugs will venture out within a few nights. If you’re seeing no activity after two weeks of consistent trapping with CO2 lures, the infestation is either extremely light or not present in that room.