I had this guy and his dog living in my basement for awhile. When he left I finally took back my basement. Now it’s full of fleas. Everytime I go down there I bring at least 10 up here on me. It’s BAD. How do I get rid of them? I don’t want to call anyone to fix the problem. And the product has to be safe with my kids. I can’t leave the house or a few days.