This happens to us about every 4-5 months. Here’s the solution: Go to Home Depot, find a product call Amdro Ant Block and sprinkle it around the outside of your house. Don’t put it where your pets might go, it’s OK, you don’t need complete coverage. In 1 day all the ants are gone. Trust me, this stuff is great. I find 1 jug of the stuff treats my house twice.
My wife goes insane when she sees ants, so I tried everything. This stuff is the best.