Quote Originally Posted by The Serpent Merchant View Post
My cages stay at 60% humidity all the time. No problems at all.

How thick is the layer of aspen? UTH's need a substrate layer of 1/2" or less to be effective.

If the floor of the tub is below 92 turn up the UTH.
Aaron makes a good point. Where are you taking the temperature from? Be sure to take it from under the substrate as your snake can and will burrow down in it and be exposed to that temperature.