You'll never be able to hold a consistent humidity level in a glass aquarium. They're made for fish, not reptiles; yet people continue to use them...in your case, you're learning new things so don't think I'm attacking you. Instead of doing a bunch of work to keep the humidity up in an aquarium, buy a sterilite tub at wal-mart for $5. Punch some holes in it (I use a soldering iron, or you can use a drill). Paper towel substrate. Water bowl. Hide. UTH on a thermostat. You will never have to mist, use a moist hide, moss, cypress mulch, plastic wrap, wet towel, etc...perfect humidity with zero work.Also make sure you're using a digital hygrometer and thermometer.