Quote Originally Posted by kitedemon View Post
Sorry it wasn't more useful. proping up the top strip might solve the problem but it is a guess, not knowing the exact cause would make me crazy (er) A second thought perhaps you will indulge me place a towel on the top of the rack and see if that changes the temps in the top shelf.
Took your advice with the towel, we'll see how it goes.

I also added some aspen into one of the top tubs. It was reading 87-89 hot spot, and after 30 min with the little bit of aspen in there, the temps are now 92 at some points! but still around 88 on most of the hot side. The tub next to it, also on the top shelf, has no aspen inside, and is still reading 87-88, so maybe the aspen is helping keep the heat a bit better?

The towel might help too, but how would I insulate the bottom shelf? Put a towel under the entire rack? Would the towels be a fire hazard? I dont have a failsafe t-stat at the moment like you suggested to me in the past.