Quote Originally Posted by bcr229 View Post
Paper towel shouldn't cause much of a temperature difference. Are you putting anything on top of it to simulate the snake's weight, like a book? If not you can get a thin air gap between the tub floor and the paper towel, which will cause the paper towel to give you a false cool reading.
Maybe that's it! I was just hitting the paper towels w/ a temp gun. With that said, I'm wondering if I should lower the surface temps a little bit (currently at 90-91).