I read somewhere about a 3-pronged approach, where they said to use bait inside the house, as well as bait outside the house, and then a spray around the exterior of the house. Supposedly, the spray keeps them off of your home, and the outdoor bait works similar to the indoor bait in that the ants eat it and then brings it back to the nest for the rest of the colony and kills them that way. I think you can buy the sprays and outdoor bait at hardware stores and places like Lowe’s and Home Depot and aren’t very expensive (and still cheaper than hiring someone to take care of the problem for you).
