This works great! It takes a about a week and half for them to be finally gone. Expect them multiply before they disappear and resist the urge to vacuum them all up before they eat this and take it back to their nest. They will eventually implode and not come back ;). One note though, just clipping the cap and leaving it there for the ants to sniff out wasn't working. So I had to let a few drops drop onto the ground and let the ants come and find it and eventually they started going into the vial to get more.