OMG....this must be the year for these darn ants! I have 'em, my neighbor has 'em. Anyway, I finally found a way to get rid of 'em. I went to Lowes and got this stuff that you sprinkle around the base of your home, OUTSIDE. Then I got a spray that you spray on the inside...you make a 4" barrier. Haven't seen one ant since.
I think the manufacturer was Max Force for both items. The outside stuff is granular. The inside stuff I sprayed on my counter, but only where it intersects w/the wall. Then you let it dry. It was odorless and colorless. I looked all over the bottle for warnings, but couldn't find anything that scared me too much. Obvioulsy, I don't put food on that part of the counter, but I'm extra safe now since I don't want to take any chances. For the outside, I just sprinkled it around the foundation by the kitchen (not the whole house!). Like I said earlier, I haven't seen an ant since (and I battled these things all summer!).
Good luck!