[racer]

You may need a pro.. Then again, its been my experience that high moisture will also drive ants "inside". Make sure the obvious.. that windows seal.. the foundation has no cracks.. that there are no water leaks in the house. That food isn't being left out all over the house. in summer, if the doors/windows are open a lot, you increase their ability to get in your home. One year we had them really bad. Spent some time clearing off plants/vines from the house as well as some "hardware store" chemicals/powders to put down outside the house. No issues since.

Worst case.. you call a pro and spend a couple $$$ chasing the problem for while.