The kitchen is almost always spotless and my wife just top-to-bottom disinfected the entire thing yesterday, but they're back again. We never leave dishes in the sink, the only food on the counter is a glass covered plate with fudge (and the ants aren't going anywhere near it), they aren't anywhere near our pantry, and we got rid of the sugar bowl after we found it full of ants twice last week. They seem to congregate around the (clean and empty) sink and adjoining counter and behind the coffee pot.
WTF DO THEY WANT AND WHY WON'T THEY GO AWAY?