War of the Ants

I am having a war with some tiny ants. Every few years the tiny ants come out from hiding and run rampant on my kitchen counter. There is never any food or crumbs out, so I have no idea what they are after. I have sprayed them with ant spray and wiped the counters with ammonia but they keep coming back. Years ago cinnamon used to get rid of them. This year the cinnamon only works to keep them out of the microwave. I think they spent the last two years coming up with a plan to outsmart me. I am by no means paranoid, but I think I heard them laughing at me. This morning when I woke up, there were no ants. They either got tired of harassing me or they are just sleeping late.