So I might be worrying a little to much, but I just need some clarification. I have 6qt tub set up. Using a uth with thermometer. Now when I read the bottom of the tub it is 93 on hot spot but in tub reads 86. The bp is reading at 89 body temp. Is she leeching the heat in tub so it's reading low? I'm using viva paper towels as substrate if that's important. Ambient is perfect at 78-80. So where should I check temps with my temp gun?