So I recently got my first ball python, my second snake with my corn being my first. He's a 3 year old pinstripe I got on Craigslist. I keep him in a 40 gallon breeder with an 11" x 11" ultratherm UTH. There's a hide on both sides as well as several plants. I'm currently using aspen but I'm about to switch to cypress. My problem is while the hot side is good, 88° to 92°, the cool side is only around 70° to 72°. He actually spends most of his time in the cool hide but I'm pretty sure that 72° is too cold for the cool side. Does anyone have suggestions for raising the temperature?