Ok I used glass tanks for years. I use coco husk substrate because it holds humidity bettee. Bulbs suck the moisture out as fast as heat dries a skillet. Its that fast. You can cover 2/3rds of the top with foil just make suure both ends are uncovered and it isn't close to the heat lamp. You can cover the sides back and part of the front with blankets to try and insulate them, or get the cork board and put them in for insulation. Also if you're using a Tupper ware bowl for a hide wet down the moss well, wring it out them place inside the hide. The extra moisture will evaporate while using the lamp. Also do you have a digital thermo/hygrometer with a probe? Don't use the analog ones because they're notorious for being wrong and you could be frying your snake. You can soak your snake in warm water about half way of its body with a towel in the container your using. The towel is so it has something to rest its head on and to rub on. Then take a damp warm towel and let it slither through. Or try the damp pillowcase trick. Both work. I've tried both and prefer soaking. Do you have a water bowl in the enclosure?