Is there any way you can get an exterminator? I'd do that before bombing. There's so much you have to do with bombing a house. Normally with exterminators you have a one time fee, but you can sign up for a monthly contract and they will come out ANY time during that month that you have a problem. I normally use an exterminator in my house because I live in a row home and the basement gets "water bugs" in it because of dampness. Basically a nice way of saying the basement gets Oriental Roaches in it... ick... but it's city living, and they spread in row homes easily. Thankfully, that is all I've really had to deal with living in a row home, but the exterminator will come out and treat ANY infestation problem I have when there is a contract. I'd check into it, it's a an investment, but it's worth the peace of mind.