Physical methods of controlling bedbugs include steam cleaning, vacuuming, heating, freezing, washing, and throwing out items.natural products found at most stores. Bed bugs prefer to hide in cracks and crevices during the daytime and come out to feed on the host’s blood at night, usually while the host is sleeping.non-chemical methods of killing bed bugs. The pest control operator will usually give you specific instructions to prepare for an inspection or treatment.