Putting those clothing items that can tolerate a clothes dryer through a drying cycle will kill what critters may be hitchhiking on them. Unfortunately sofas, couches and arm chairs wont fit in the drum
These creatures are a real problem in Toronto. Long ago when DDT was still allowed they were run off, but now they have come back with a terror. The sprays are safer now since they use a compound distilled from chrysanthimums.
Nonetheless, these buggers are nasty and difficult to get rid off.