Is it a glass tank? I insulated the three sides with a roll of foam insulation. Then cut a piece of wood for the lid over the wire mesh. I cut two holes slightly bigger than the heat lamp. The other hole I can cover with a wet towel or better yet aluminum foil to hold humidity. The Tstat is set on about 95 to heat the glass on the bottom inside of the tank to 90. The Tstat probe is between the UTH and bottom of the tank on outside. You measure with a temp gun (best buy ever) under the substrate in case your snake burrows. The heat lamp controls the ambient temp. I have a digital thermometer/hydrometer with the probe on back wall mid tank, measuring ambient temp, which I keep around 80. I also keep their room temp at 78 with a space heater with digital thermostat. Try insulating and covering the screen with wood or foil and see if that helps.

On the other hand I have my babies in a self built rack in plastic tubs. Right now the tubs are 26 long, 18 wide, and 6" high. But I built the rack to hold the iris 70, which they will graduate to. Flexwatt heat tape set on Tstat set at 90, paper towels substrate for now, ambient stays at 80. No heat lamp, and humidity stays at 50-65. Easiest thing in the world!! I set the clear sided tanks sideways for better viewing. Problem solved!!


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