Cuda I have 2 of the racks that you have for my BP's. I have 13 BP's. I have had the same problem that you have had for the longest time and I couldnt figure it out. Since I cant keep my room where I have them 80 degrees I just added a fan to circulate around them. It works perfectly. I added more holes in front so the air could circulate more freely. none in back of the tubs. So it keeps the heat in the back where the heat is and the ambient stays up too. The humidity usually runs around the 55-65 range. Mostly it average around 57-60 unless I got them a little high once they are shedding. I also have the water bowls all the same. Hope this helps. If you need pics I could snap a few just hit me up on pm.