Well it's quite dry. You can take a plant sprayer and lightly mist the tank once or twice a day. Don't mist too much or it will cause mold to grow, and by night the tank should be dry.
You can also place a small water container on the hot side to evaporate, and cover part of the top mesh if you have it.
When your snake goes into shed he (?) could have problems with it. This time, instead of misting I think providing a humid hide would be best.
I hope this helps.