We've also used the Terro easy to use just put a drop on a piece of paper or thin cardboard in their path and it takes care of them. Try if you can to see where they are coming in by a window or door. We've had them come thru the tinest hole under the window frame or under the front door any little opening. You can also spray some Raid they have for ant's just a little bit to get rid of them at the moment but the Terro they bring back to the nest and it gets rid of them. Good luck what a pain they are. Sue