First time smoking today.. I am doing a rack of ribs. I have the 18 all setup and for the first 3 hours smoke was bellowing out I added just a couple piece of charcoal and wood just to keep the temperature up(I guess) I set it and forgot it..I even left for two hours. So now I'm back home and the temp gauge on the smoker is still in the gray area but there is NO smoke coming out?? What's wrong or is that Normal? Thanks