Where exactly should my temp prob be placed? Should the probe be all the way under the substrate, or slightly sticking out? I cleaned her cage the other day, and put it under the substrate. The temp went up to 120. I moved it to where it is sticking out a little bit, and right now its 90. I know she dosen't go under the substrate, but I don't want to burn her either. I have the cool side on a lamp dimmer.