everyone seems to recommend boric acid. Where can I find it. I looked all over drug store, home depot.
My house is slab on grade. I keep getting occasionally ant invasion. I caulked everywhere. But they still seem to get in. I try the powder form that spread around the perimeter and the ant traps inside the house. They don't seem to work that well.
The ants I am seeing seem to be tiny black ants. (probably not carpenter ant)