For the entire 15 years in this house we have had tiny ants. I had tried everything! Terro was pretty good, but it would take up to a week for them to get their fill and leave. Finally I couldn't stand one more year so I went to the hardware store and asked them. This stuff really works!! ORTHO HOME DEFENSE insect killer for indoor and perimeter. 12 month control.
It is safe to use in the kitchen. It is supposed to last up to a month. It was magic! Watch for the line of ants and see where they are getting in and spray this great stuff around the entrance. If you can't find that, just spray where they seem the worse. We have been two years ant free now. I did see a couple and quickly got out the spray and no more came in.