Thought I'd note, 92 degrees (which is the proper hot spot temp) feels like nothing to the back of our hands. Thermostats to regulate ANY heating element is a 100% required piece of equipment for snakes, not an optional kinda thing.
For humidity, if you have a screen top, you can soak a bath towel, squeeze it down so it doesn't drip, and fold it over the empty half of the screen top. That shoukd up humidity by a lot. You can also spray the walls of the tank every few hours, if not.
Do you have a digital hygrometer or are you just guessing that it's dry?
you'll also want to buy a digital temp gun to measure any surface or ambient temps. It's very handy!
Snakes are only easy to keep if you get the setup and husbandry right. If it's off, there is a whole host of risks and stress to pay for.