Removed the wood box and used a wire brush and gave all sides a good cleaning. Cleaned the smoker temperature probe also. Went to install the wood box and noticed only the front loops of the heating element were touching the wood box. I very carefully aligned the heating element rear loop. When I install the wood box the 3 loops are now in contact with the bottom of the wood box. I smoked 3 racks of Baby Backs using 3 chunks of apple wood. The smoke production was greatly improved. Thanks All for your replies!