I bought a bug bomb today after seeing a roach. Has anyone done this before? Should I set off one per room, or just one? And if I do just one, where which room should it be in? I'm completely confused! Thanks for any help you can offer. EDIT: I set off the bug bomb in the different rooms, one for the living room, one for the kitchen and one for the bedroom/bathroom area. Nothing blew up and all is well :) I also haven't seen any dead bugs, so perhaps it wasn't an infestation. Phew!