First spray around outside of your home and seal off any holes. Are they tiny ants, 2 section ants or giant 3 section ants. They can't digest cornmeal. Look around at your trees and see if they are any holes that they are living in. I had 2 big Poplar trees taken down last year and they were all over them, and I found no holes anywhere on that tree. At Walmart, Lowe's or Home Depot, they have something that you can spray your grass with but you have to keep the children & pets off it. I have Bell & Howell plug in's for inside that keeps ants away....Walmart $18.00 4 in a package.