I have a 20 long and have a hard time keeping up the cool side without getting the hot side too hot. I have an UTH an the warm side and a 100 watt light right in the middle to keep the overall temp at 80 and the cool side a 78 but this makes the warm side sometimes get up to 95. Is this ok? At night the temps even out ok. I also have trouble keeping my humidity up. I have been spraying the tanks down 4 times a day but unable to spray them from about 11pm till 8 am then unable to spray from about 8 am till 6 pm due to busy life style. What do I do about this? I have been useing towels on top of my screens thinking about using duct tape. Good idea?