Some Questions..

[vivi]

Sorry i forgot to include that you can still have it inside, as long as its secured. I have a suction cup and it stays on even when I pull on it. I also place mine under the hide where the heat mat is and so there is no/low chance of defecation or urination on the probe.

You can also use silicon meant for aquariums as well.

Yes, but...

Why go through all that trouble of making sure it is secured?

Putting it between the glass and UTH eliminates ANY chances of it being moved, peed on or otherwise so there is really no point for it.
Your snake can´t mess with it if it is outside the enclosure.