If it's something in your clothes or bedding you'd have bites, not just general itching. Do you have bites? You don't disinfect insects, you kill them with some form of insecticide. While there may be temperatures both cold and hot that kill adults, it might not kill the eggs. Hospitals disinfect for bacteria and viruses. That's a whole other thing. When a building becomes infested with, say, bedbugs, it usually throws everything away and then cleans and buys new stuff. If it's not insects and it is from your bedding or clothing, it's more likely allergies.