Everyday, I am either killing or finding dead bees in my house. Usually about 4 or 5. I have been on the roof(flat), and there is no sign of a hive anywhere. I am not even sure how they are getting in. It's definately not through a window or a door. I have checked and rechecked that possibility. Dont know how or even why they would even want to. Any experience with this sort of problem?