tshnc01--I hope you don't mind if I piggyback on this one rather than starting a new thread.
If my observation window is fogged up after a couple rainy days, do I need to work on ventilating my hive better? If so, where should I have ventilation holes? For now, I just propped up the back end of the cover to help them dry it out. My entrance is on one end. Where else should I have entrances/holes? On one hive, the lid is loose enough that bees are getting in underneath the lid. Will this be a problem in winter?
Fog on an observation window sounds bad. I don't have any with observation windows, but clearly there's too much moisture and not enough venting.
I'd drill a 1/2" hole near the top of either end and then staple #8 hardware cloth over it to keep it from being used as an entrace.