I assume your snake is a ball python, correct? You never said what kind of snake it was. LOL

Thermostats on your UTH are necessary to control your temps. If you are worried about humidity or having problems keeping the humidity up in the tank, you might want to think about getting a humidifier. just as you've bumped up the ambient temperature, you could humidify the whole room. misting once or twice a day helps too if you don't take the humidifier approach.