We've got them, too. Little ones on the kitchen counter and the big black ones on the floors in almost every room. I hate them! My hubby set out the bait that they take back to the nest, then last night he brought home something else that he sprinkled along the baseboards, but I didn't see what it was. Something is working, because I've only seen one of the black ants today and none of the little ones. I hope they're all gone soon.