The UTH will help and foil cardboard combo will keep alot of heat and humidity in, on my screen top i cut a piece of cardboard 2/3 s the length of the screen wrapped it with foil tucked it into place and taped it down , I left about 2 inchs of space on the cool side to provide proper air flow ,I mist once a day and my hmidity stays between 50-60% and ambient temp 80%