I switched to paper towels. I will remove the lamp, does he not need any daylight lighting to know his day from night? I covered half the screen minus where the light is, but does he not need a flow of fresh air or can I really just wrap that off as well? No, he doesn't need any extra lighting at all. The daylight coming in through the windows is enough. So unless he's in a closed room that is pitch dark 24/7, don't worry about it. He does need a little fresh air. Cover about 90% of the screen top. You only need a small "vent". Perhaps a 1" opening at either end would be a good choice so there is some circulation.
Like I said I give him high humidity in the morning hours roughly 80 - 90 for 2 to three hours, then the daytime stays around 50 - 70 but I have to mist every few hours or it will drop down to low 30s. As I said before, once a day is fine. You're going to be constantly misting all the time if you try to keep that up. It is fine for the humidity to drop as long as a once-a-day heavy mist is consistent. Humidity is often way over thought. Again, I would mist once at night instead of in the morning - geckos are more active at night and will drink better at that time. If you cover 90% of the screen top and add a couple of live plants, that will also help with the humidity very much. Misting will only go so far - cover the top and put in live plants and some sphagum moss to keep moist. You'll be all set.