I couldn't find a direct answer to this anywhere but I'm having trouble keeping up the humidity.

I monitor my ball python's (Bender) stats everyday constantly but every time I bring it up to 60 or so it goes right back down to 30 in less than half an hour.
I use the lamp to evaporate water into the air, I cover half the tank with light cardboard, I mist, and I have started putting in a sponge in a little shot glass.
Bender is starting his first molt with me and I need to solve this problem.
He is a good eater and very friendly so the humidity dips have not affected him really before but I would like him to have a good and happy molt.

sorry for the length this is my first post thank you for your help!