Asked May 13, 2015, 11:15 AM EDT
We have very, very tiny black ants in kitchen, can't find where coming in. Have sprayed, put out pellets, they don't go away. They are concentrated in and around kitchen sink. Sink is sealed around perimeter. I have wondered if they could be coming from drain. They show up during the night and there are lots of them in the morning in sink and on top of cabinet near sink. Hard to kill, so small they don't even smash. First used Windex on them, then have tried 2 kinds of ant killer without success. Now have stoppers in drains, but don't know. Husband also sprayed outside as close as possible to edge of siding. Have deck next to house, so can't get lower than decking. Help with suggestions if you can. They haven't seemed to necessarily gravitate towards sugar in area.
Arapahoe County Colorado