I've only been doing smoke for about a year now with some success. I think that my culinary background infused with bbq skills has something to do with it but yesterday I was doing an event, I'm checking my internal temp on my pork butt when a gentleman walks up and says " why you open your smoker to check the temp"( the internal temp of my butts I was smoking) and walks away. That's the second time I've heard that. Can somebody please explain to me how can i check the internal temp without opening the smoker? am I missing somthing here?!!