I put my little guy in a tub and I am having some trouble now. The UTH is set to 94, but when I use a temp gun to confirm it, the temp gun says it's only 81 degrees. I'm not sure which one to believe! There is a sheet of paper towel between my snake and the tub/uth, so I don't think the substrate is affecting my temps. What do you think? Which one is right?