The temperature in the cage is too low and it's because the UTH is not sticking. I'm using some blue paper tape one the edges but it's still not sticking. Especially on the center where I need it to stick the most. I have duct tape, electrical tape, hot glue gun, blue paper tape, and regular clear tape. I might have some aluminum tape but possibly not. I think the hot glue gun will work the best but I'm not sure if the heat will melt it or it won't conduct heat as much. I do have a thermostat on it and I have it set to around 98 degrees (because of the low temps since the UTH won't stick).