When spring arrived, so did the ants.  I've tried several things to get rid of these little guys.  I've kept the kitchen clean, wiped down the counters with bleach, and tried the Combat Ant Baits.  None of them worked.  Now I tried the Terro brand ant bait and it sure was attractive to the ants.  They came out of the walls in the hundreds!  Hopefully they've brought the poison back to the queen by now and they are dying off.  I've got the creepy crawlies!