Thanks for your reply!
I have the CHE over the cool spot of the tank and the thermometer says that area is at 83F. However, the thermometer in the middle of the tank which I guess is the ambient temperature is at 78 and when I woke up this morning, the humidity levels had dropped to 39%....

I wrapped about 2/3 of the screen lid with saran wrap last night but I don't know if that has helped at all...

I have three thermometers, one tstat and a temp gun but all of them 1. give off completely different numbers 2. change drastically (up to 5° in minutes)... it's just been really hard for me to figure out how to get the ideal temps and humidity levels right because I can't seem to get an accurate reading....