Finally put together my Weber kettle. Decided to do spare ribs (first time ever BBQing). Used a snake method. It started off promising, was around 225° for the first hour and a half. I wrapped after an hour and a half and hit it with some more charcoal and was sitting around 250°-260°. I left them wrapped for two hours and they did NOT move off or 160°-165° internal. I took them out and let them go around 250° for another hour.. and still no movement on internal temp. What am I doing wrong?! Any help would be greatly appreciated! Pic is before I wrapped