I agree...Clare, you want the thermostat set so that it achieves 90* maximum temp. inside the tank (& ONLY on the warm end...NOT the whole tank) & where the
snake can possibly make any contact. Not 95*, that's too hot, your snake can be injured.
You also need to double check (like with an accurate "temp. gun") what the ACTUAL temperatures are inside the tank, not just take the thermostat's "word" for it,
since the actual "inside" temperature may not be the same as (or as high as) what the thermostat is set to.