Speaking of washboarding ---it is really hot here abd has been all year.
Yup! This is precisely what my primary hive looked like for most of the summer (I have two other nucs).
I came up with a watering system that would funnel rain water into a reservoir in the hive with the theory that it would keep them from watering at the neighbor's pool, and more bees being able to work would bring in more honey. The "washboarding" almost immediately stopped. Pretty much frighteningly so...
So one of two things have happened. Either my theory/invention actually worked - meaning more bees are able to work since they can better regulate temperature without having to gather water... or I've just managed to kill all my bees. This weekend I'll be opening the hive for the first time in a month to see the results. Wish me luck.