Hi I am relatively new to smoking and am wondering if you guys place new chips in the smoker while its smoking? The first 2 times i smoked i just soaked a couple hand fulls at the beginning and put them in and that was it. I noticed that after like an hour or 2 it stopped smoking though. Does this mean I should add some more chips? Also does anyone use a rib rack on their smoker? My smoker is relatively small and i can only fit 2 racks. Does a rib rack alter the flavor or smoke unevenly?