Ok,

so I made some changes. I took off the Saran Wrap and put a 75 watt infrared light in the middle of the screen and damp towels on Both sides of the light. Now the air on both sides of the tank are 80 and the substrate on the hot side is still 90.

Is it okay for the air to be the same temp on both sides as long as the bottom is only hot on one side?

again, sorry if I sound ignorant. I really did research before I got her, but I'm finding new info everyday and I just want to make sure I'm doing things right