Ok. I built a melamine rack about two weeks ago and let the temps even out to 91 on the hot side and 81 on the cool side. Humdity was perfect, 58%. So I put the snakes in and it was fine for a few more days, then the temps started going crazy. The top tub only got to 88 on the hot side and the one right below that was at 94. The rack is wired with 1' sections of 11'' Flexwatt (belly heat) and is controlled by a Helix DBS-1000. The probe is taped to the underside of the middle tub (there are five tubs). The thermometer probes are taped in the same spot to the bottom of each tub. I thought I did everything right, but I just can't get the temps to even out like they were before. I really need help here. I'm stumped!