Terro works great on ants.Try Terro ant killer. It's a liquid you can put it most anywhere I had a problem with a vehicle I bought a couple of years ago they had made a nest inside one of the seat cushions. Ran a few beads of this liquid on the door frames never noticed the smell never got it on me waited about a week when do the car wash to use the vacuum and there was a big pile of dead ants under the seat.