R.H.
Try to put (this is no joke) nutrasweet (aspartame) in and around entrance points. I am not kidding I used this on a fire ant pile outside and it was bizare but the pile died in a few days. All you do is sprinkle it and spray a light mist of water on it. The water "activates" it. It might make them come in worse for a bit but they will eventually not be there anymore.
This acts as a bait.