I always tumble, and then wash, my semi-auto cases. This is because they flop around on the ground, and when I pick up mine, I always pick up some of somebody else's, which may have been sitting around for a while.

But how about revolver cases? You fire them, eject them back into a container, and take them home. They don't have a chance to get dirty, or sit around and corrode a bit.

What do y'all do?