Since it is sunny and HOT today like every sunny day I pulled out my wax melter.
You can see the thermometer inside, this design doesn't work that well, it is to deep, a better design would be a black metal sheet 4 - 6 inches away from the glass, this will be change when I get around to it. It will still reach almost 100c the problem is when you pile comb inside the top layer melts then runs down to a cooler layer and freezes, so a larger flat black metal surface about 6" away from the glass should work much better.
This is a shot of some de-waxed comb, you can see the cacoons made inside each wax cell by the bee larva, once the wax is gone they just fall apart.