I've been using a maverick for a few months now as my primary smoker temp gauge. I never did a boil test when I first got it, but when I turned it on in my house it measured 72 degrees which is where my a/c was set so I went with it. I just got a tell tru last week cause I figured if my maverick ever died during a cook I'd be up a creek. The gauge that came with my smoker sucked. So I did a boil test on the tell tru to be sure and it was right on 212. Well when I put the tell tru on and started my smoker this morning, the maverick is almost 70 degrees off??? It is positioned relatively close to where the tell tru probe is too. I noticed my maverick getting funky during my last smoke over Memorial Day, but can't imagine it's that far off. Did I maybe knock the calibration of the tell tru off during installation? I tried not to tighten it with the dial and just with the nuts.