We have a flea problem in our basement for about 3 months. This is the 2nd time we bombed the basement. We have no problem in the house. Only the basement. We do have a cat, but she is treated and we no longer allow her in the basement. We had an old well in the basement, and left it open for about 1 month to repair cracks because it leaked. But this home has been hooked up to city water for years. We have been buying HOT SHOT spray and 2 kinds of bombs-hot shot and raid. Shouldn’t this been good enough by this time?