Most of the time the stat works great and I think it is actually pretty responsive. I load the fire in a warm stove and the coals restart the fire. I set the stat and after the stove gets hot, the stat shuts the air down and the fire reduces to cruising speed. Stove temp is maintained. Life is good. When I first got the stove I verified that the stat was manufactured properly and that it works as designed. So what's been happening is that the stat won't close when the stove warms up and the dang thing gets hot when on a low setting. I saw 750 last night on the stove top and the stat was set at 1.75. My fix has been to turn the stat to a lower setting and then back up to 1.75 at which time the fire visibly reduces and the temps drop to the normal 1.75 cruise temp of 500 or so. It's never gotten above 750 and I've always been able to control it but I am losing some confidence in the automation of the device to where I feel I need to babysit it. Has this happened to anybody? It seems like something is sticking. Is there a place to lube the mechanism? Any ideas? The thing works normally most of the time. It's just not quite closing the stat on occasion.