Posted By North Star.

For a nontoxic ant repellent, drip lemon juice into floor boards, window sills, cracks in the walls, or any other place where ants appear.

Submitted by Ron Henslee, Missouri ~
We saw a lot of ants in the cupboard and investigated. They were drawn by some sugar that was spilled there. Laying close by was an Alka Seltzer. Yes... dead ants too. They must have died after eating it. Worth a try. It works here in Missouri!