When I used to live in Carmel Valley, it was like living on an ant hill. FLU is right. They want water. Doesn’t matter how clean you keep your house. They’ll find a spec of something and they’ll be on it. Oh, the mornings coming down to my spotless white kitchen only to see a black trail of ants marching along. It would freak me out. I tried all kinds of stuff. Unfortunately, I hate to use chemicals and only used it when I was at my wits end. It was a constant battle. I don’t miss that. And I don’t have a good answer for you. Sorry. Hope someone else does. This is good information to know. I have heard of Terro and had limited success w/it. I lived near a canyon at the time and the supply of queens and ants are unlimited and endless.