Cinnamon didn't work here either. We used Terro--2 bottles--and still they came! I think I tried every suggestion out there. When they started marching across the table and onto my own plate, I called the exterminator. The only peace I could make with myself over these little invaders was that they weren't roaches! I've only seen a couple of ants since the exterminator's second application but I'm crossing my fingers. Last week I finally found a huge nest with at least a cup of eggs in an unused mailbox in the carport. They went swimming! How can those tiny creatures be winning the battle? And they seem to be everywhere, not just at my house.