I poured oil and methanol around the areas they were coming from in my back yard and set it on fire. They came back! I then 1/4 sticked a few troublesome areas and they came back. Then I bought an ant eater and it ran away. Still had ants. So finally I went to our local hardware store and bought this ant and spider powder from ortho. I sprinkled it in the burned up and cratered areas and shazam! No ants in the house.
