Hey, I see you're in Minneapolis! I'm in St. Cloud.
Ya, the thermometer's been in the cage for about 2 days. It does change outside the cage because I had one of the same thermometer/hygrometers in Steve's Exo Terra setup and it was reading in the 40's for humidity. When I first put them in these tubs they were reading around 65% but just kept going up and sit at 99% now.