What if the probe for the thermostat falls or in my case my snakes burrow and what if it gets knocked loose. I can put it on the outside of the tank and do it that way but I find that a dimmer switch works better.
You're not suppose to keep the Thermostat probe inside the enclosure. That's improper use and like you said, your snake can knock the probe loose. It can also get damaged from the moisture/water/urine.