Okay....Not sure if I am a DUMB*** or if this thermometer is a piece of crap. I just received in the mail a Fermentap thermometer for my brew kettle. I've tried calibrating it over and over again to several different temps using a digital thermometer that I have. Seems like I am doing something wrong because I can't get the damn thing to read a decent temp range. The calibration screw is a hex wrench screw and the instructions for calibration seem wrong that came with the thermometer. Can anyone that may have experience with this thermometer or even other brand Bi-Metal thermometers maybe give me some info on how calibrating these things works and how broad of a temp range they are supposed to be accurate. I feel like I am about to ship the damn thing back to MoreBeer and get my money back for it. Thanks for comments in advance!!!!