I have had a pork butt on since 6am. Pork Temp got up to 190 so I took the foil off to try and get a bark on it. My temp has now dropped to 181? What's the deal? I am suppose to be eating in an hour? Running the smoker between 225-250. I can't wait another 3 hours to eat. Can anyone give me any insight as to wahat is going on?