I would get a 2nd humidity gage, one for each side. Cause if you have a heat lamp on one side that is going to make it a lot drier there. I had the same problem when I started my setup. I put a piece of cardboard over the screen with a cut out where my heat lamp is, and just poked a couple holes through the cardboard. I also put the water dish right under the heat lamp to evaporate the water and increase the humidity.