Now I know why my good buddy Charlie gave me a deal on telescoping covers. He is so bothered that I beat him in his swarm baiting competition. Charlie, if you can't stand the heat don't start those threads.
We both keep bees in foggy exposures and he had figured out how many bees die on these covers on a wet morning. They fly in and land upside down in the condensed fog puddle on top of the covers, and die of exposure stuck upside down.
I count 20 on three hives this morning alone. Any suggestions on solving this problem? Maybe I will switch out to my new rough redwood western covers.