Hello everyone! Recently got myself a 3 tub C serpents rack. First rack I've had.The temps without paper towels in the tub are running 89-91.5 Using a herpstat intro+ with the probe taped to the side of the middle rack. When I add the paper towels the temp underneath raises a few degrees on each spot. Is this normal? I dont want to to over heat my animals and just wanted to make sure before I place a snake into the rack.