You really don't need to do much. It just gets really dry where you and I are located, in the winter. Mine usually hovers between 40 and about 55% humidity. Try not to use a heat lamp this time of year. It dries the air in the cage out quicker than anything. A towel on the top, and a humid hide will do the trick. To get it up some, you could mist a couple times a day for a couple days. I wouldn't do that much though. You don't want the substrate damp. That will cause a whole set of new issues. His head should clean up over time. With future sheds. He looks really dry on his head. Like he has been sitting with it under a heat lamp.