I picked up a magnetic thermometer. Same one mentioned in this post by DiscoInferno here: https://www.hearth.com/econtent/index.php/forums/viewthread/25762/#271390 My question is, can I or can I not use this on an insert? I attached it to the top of the insert (which obviously was quite hot during my break in fire), but the needle didn't budge. The thermometer came with a wire that I am not using, because the limited instructions talk about wrapping that wire around the pipe. Obviously, that would be possible with a stand alone, but I cannot do that with my insert. Am I suppose to use that wire, and, if so, how? If I'm just supposed to stick it to a metal part of the stove, then mine appears not to work.