This April I put out a white plastic bucket with wine corks floating in it. I "baited" it with some lemon grass oil and bridge comb on the handle with a little honey. The bees found it right away and seemed very happy. My motivation was to give them an alternative to the vanishing edge of my swimming pool. Last year that was their water source of choice, but lots of bees drown when we were splashing in the pool and sent a wave of water suddenly over the edge. Also a couple of folks got stung. Last week, for some reason, they quit using the bucket. They are not on the vanishing edge or the soaker hose I have out. I don't know where they are getting their water and wonder what would cause them to abandon a water source they were using?