I have a Lexington 540, my first pit boss, I want to smoke meat so I turn the knob to smoke and it seemingly heats up fine and the electronic temperature indicator says it is 180 and the other temp gauge on the lid says 200. I put chicken on and left it for 8 hours (10am - 6pm) and the chicken will not get past 140 degrees (checking with included probe and normal meat probe), one would think after 8 hours the chicken would surely be the same temperature as the grill itself at 180? I've tried 3 or 4 pit boss recipes I have found and followed to a "T" but everything never gets up to eating temp without cranking the heat way up. What am I doing wrong here? I can't comprehend how the meat does not reach the same temperature as the grill itself after 8 hours lol.