The water didn't work on th bees. I ended up with a spray from the Farm Store that says it would shoot a 20 ft stream. Last night, I sprayed and aimed towards the hole from the sidewalk. The spray piled up like a bunch of whipped cream on top of the hole. Left it.
Read the fine print - it says to spray all of the can into the hole. Hmmm. You'd have to be right on top of the hole to make that happen.
This morning by the light of the full moon, I got closer, and sprayed more into the hole, but still piled up like whipped cream. Left it.
Came home from work, and so far ... no bees!