Help, heating wooden enclosure.

[stevepoppers]

I built a wooden cage (you can see it in the DIY section) and I'm heating it using a sheet of flexwatt inside the cage.
The wires run outside the cage and there is a ceramic tile on top of the flexwatt. On the tile is about 2-3" of substrate. The max temp I'm gettin on top of the substrate is like 94-95 degrees now depending if the door to my room is open or not.

What if they burrow down underneath the substrate to the ceramic tile? What temperature will they get there?

I'm sorry. It just sounds too hot from what I've learned here.