How do I keep my BP's cage humid?

[ErikBush97]

Hey, Everyone. If you've read my previous posts, you may know I was thinking about getting a ball python. Well... I did! And I bought a FULL setup for him/her that includes everything I'll need for the next year or two (besides the food, of course). anyways, I just got him/her today, and I'm experiencing a problem. I cannot keep the terrarium humid!!! It's at about 70/75 F degrees (and rising) with about 10% humidity. That definitely doesn't seem right to me. I have some humidity spray that came with the setup I bought but I'd have to use the whole bottle to make a dent in the humidity. What should I do, and what's the appropriate humidity %? Thanks everyone.