He just shed Saturday (5/23), is regulated by thermostat, and I did a deep clean/changed substrate out completely after his shed. He's using aspen bedding and I did notice it was a little damp out of the packaging, so I dried it out in the oven at 175 degrees for about an hour and it was dry to the touch. His thermostat for his UTH is set to 90 degrees with it usually lingering at 89-90 when read with IR. The humidity in his tank is slightly higher than normal but holding steady at 65%. This is worrying if those are the only three options, though. Is there anything else I can be checking?