Alright all you top bar beekeepers out there I need some input. I have been reading different forums and conversing on this page about screened bottom boards in a TBH. I myself have a TBH with a screened bottom board in it, I noticed about a week ago when I pulled out the bottom board a fairly large amount of pollen on the board, so I pretty much swore I wouldn't use screened bottom boards again... until this afternoon, I went out to check my hive and I noticed a lot of bees swarming around the entrance, when I viewed the bees through the observation window they were going crazy in the hive, when I removed the bottom board almost immediately the hive calmed down even the bees swarming around the entrance calmed down. I think I need to rethink the screened bottom unless I can find another way to vent the hive. any suggestions?