I sprayed ants on my desk with windex. Yesterday after eating an avocado I left a spoon on a paper on my desk. No crap left on spoon but the avocado smell somehow got the ants excited enough to find a way into the house. They were at least 20 checking out the spoon. I sprayed them with windex, they stopped moving and were little black crumbs. I left it to dry. This morning, all gone. Nothing on the paper, nothing on the spoon. The damned ants came back sometime in the night to carry off their dead. TIL ants clean up after their dead