every possible hiding place otherwise the bugs will bounce back and the first treatment is rarely the last one a few of the parasites always seem to survive often because they ve grown resistant to the standard chemicals researches the developing a quick test to help exterminators decide which chemical will be most effective against a particular colony of bugs. these pest control professionals used both chemicals and heat the bugs in their eggs perish when temperatures hit fifty five degrees celsius this heat is a recent development it comes in different sizes this one is big enough for a suitcase cushions or a bedspread. freezing objects also does the trick exterminators say when you come home after a trip it s a good idea to shake out your luggage over the bath and wash all your clothes at sixty degrees because if even one bug gains a foothold in your home