Hey guys. It's been a minute since I've been on and even smoked. Well I finally upgraded from my good old junior charbroil offset smoker, to the 22.5in weber smokey mountain cooker! (Thanks dad for the giftcard). In fact, I'm doing my first smoke on It! Only thing is, I can't keep the temperature up! It keeps dropping rapidly! All vents open, full chimney and everything! I'm trying to do pork ribs, but the temperature just isn't holding. Do I add another chimney? And my maverick and weber temp Guage are about 20 degrees off. So I'm not sure who to believe! Weber temp says 215, maverick says 171. I'm so confused!