What SnakesRkewl is trying to ask you is: Is your under tank heater plugged directly into the wall, or do you have it attatched to a thermostat? A thermostat is a device which will give proportional power to your Under Tank Heater, controlling the temperature on the floor of your enclosure. It is triggered by a temperature probe which is placed under your substrate inside the tank. You must have one so that the under tank heater does not reach high tmperatures and burn your snake. If the temperature of the substrates surface is 95 but the temperature of the bottom of the tub is 110, your snake could burrow into the bedding and get burnt.
Your snake is about the same age and size as mine. Follow my earlier suggestions and see if that helps.