we had ants so bad one year that they were biting us in bed while we slept, in the furniture and the carpet. We called an esterminater and they come every 2 months. They said that they were actulally in the walls. He drilled some holes in the wall(never could see those holes) and put their magic in there . No more ants (knock on wood. This is some of the best money I have ever spent. I hate bugs in my house and I don't care if they were here first.