What temperature kills bed bugs?
Sources agree that 122°F kills quickly. University of Minnesota says bed bugs and eggs die immediately at 122°F or within about 90 minutes at 118°F. For steam, EPA and Penn State say the steam must be at least 130°F, and University of Minnesota says surfaces should reach 160–180°F or bugs may survive.
Does steam kill bed bug eggs?
In one study, yes. Puckett and colleagues tested a commercial steamer and all treated eggs died, with no hatch over 30 days against 96% hatch in untreated controls. That was direct treatment. Effectiveness against hidden bugs remains untested, the same authors say, and eggs tucked deep in a crevice may not be reached.
What type of steamer should I avoid for bed bugs?
University of Minnesota says not to use a clothing steamer or a carpet cleaning machine, and to avoid pinpoint nozzles. Purdue says most retail steamers do not get hot enough. We found no independent test of a small handheld for bed bugs, so we do not recommend one for this job.
Should I put a towel over the nozzle?
Guides disagree. Purdue says wrapping the head in a towel can intensify the heat, and Rutgers suggests one if steam might blow bugs away. Stephen Kells’s Bed Bug Summit slides say towels reduce penetration. If you use one, check the surface temperature with an infrared thermometer, as University of Minnesota advises.
Can steam damage my furniture?
Yes. Rutgers says steam may damage finished furniture surfaces and some fabrics such as microfiber, and University of Minnesota says going above 160–180°F risks damaging fabric. Test an unseen area first. University of Minnesota also says fabric may be damp but should not be wet, and to use a fan afterward.
Should I steam around outlets?
Be careful: we found no extension or EPA guidance on this. University of Kentucky lists outlets and switch plates among hiding spots, while Bob Vila lists outlets as never-steam items and Bissell says steam must not be directed at electrical components. Ask a pest professional to deal with those.