(Updated 3-3-2012) Swapping places with the two brood chambers At our last meeting, our guest speaker recommended to the new beekeepers, without any additional explanantion, to swap places with our brood chambers as soon as it warms up enough. He suggested moving the bottom up and the one that was on top down. He said that should be done at the start of each spring season. I had to leave early and didn't get to ask why so I'll do that now. Why?