Hey there,
I've had the same problem as you and just recently solved it.
I switched from repti-bark substrate to coconut fiber (it's basically soil). I also put plastic wrap over the wire mesh. It helps a lot. I also got a repti fogger and put it on a timer so that it turns on for 15 minutes every 2 hours. My humidity usually peaks at 80 (right after the fogger turns off) and then floats down to about 50. Then the fogger turns on again within 30 minutes or so.
It is not a steady balance but coming from a place that's so dry that even people get frequent nosebleeds and eczema, I think I am doing pretty well, lol.
PS - inb4 someone comes in here and demands that you switch to a tub![]()