put that probe under the enclosure. get a digital thermometer and put the thermometer probe on the warm side. Adjust the Tstat according to what the thermometer says. If you set your Tstat to 93,and your thermometer reads 89, then you'd bump the temp up to 95. If the temp then reads 91, bump the Tstat to 96. does that make sense?

you don't want to risk the snake moving the thermostat probe...other wise there's a pretty good chance of burns.

what's your ambient room temps?