and chances are your gauge isn't acurite. i feel all the store bought stuff is junk anyways, pay attention to your snake, their the best humidity gauge there is for a snake keeper. the amount and length of time condensation on your tubs walls is a good gauge also
Best advice. I know my humidity is too low when Snickets moves to her cold hide. The UTH will dry out the substrate. I spray water, and the next day she'll be back in there.