i had this problem recently too man, think its cause of the heat. Under my couch are all kinds of goodies that they were gettin into. For starters clean everything really really well, even go as far as to steam clean. Then try and find out how they are gettin in, mine were gettin through a tiny crack in the window sealent. I killed alot though, maybe 50-100, but its cause the thought of them all over me when i was sleepin didnt sit right with me. Good luck!