What is warm to your or I may be HOT to your snake! Our skin's temperature can be up to 95F, which is too hot for a snake, so it feeling warm to the touch could be dangerous.
It is IMPERATIVE that you get a hygrometer for humidity and TWO thermometers ASAP!! I have heard that a good range for humidity is 30-50%, and cool side temps should be 73-75F, warm side should be around 83-85F. There needs to be a temperature gradient within the tank for your snake to choose what is comfortable to them.
Also, UTHs need to have space between the outside of the glass (where the mat must be placed, NOT inside the tank), and the stand it is on, to allow air circulation.
I hope this helps. I know there will be other input as well. Good luck!