What wattage are the bulbs, and what is the amibent temperature in your house? I'd also say to look and make sure no A/C vent is blowing directly or indirectly into your tank. Where are you taking these temperatures? Best place is about a 1/2 inch above the substrate. Substrate stays cooler than the air temp, so thats why I say to take the temp above it.
Some things to try:
* Higher wattage bulb(s).
* If it's under an A/C Duct, get yourself some plexiglass and cut to the top of the cage, then tape it down. (I'm about to have to do this so ill post pics shortly.)
* Insulate the tank. Go down to home depot, look on their shelf lining display, and get yourself some cork shelf liner. Run this at least along the back, if not one or both sides. I have it along the back and in addition to helping keep heat in, it looks nice
(It's not an EXTREME insulation, just minimally helping.)
Also... what kind of snake is going in here?
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-Chris
The reason mainstream thought is thought of as a stream is because it's so shallow. -George Carlin
A fool doesn't learn. A smart man learns from his mistakes. A wise man learns from the mistakes of others. Which one are you?
My Website
N. American Rat/Corn snake care sheet I wrote
Information on substrates
Current snakes:
0.1 Licorice Stick Black Rat (Lola)
1.0 Black Rat (Frankie)
0.1 Texas Bairdi (Rosa)
0.1 Blue Beauty (Brunhilde)
1.0 Green Tree Python (Monty)