I got a 2 door brinkmann smoker and need some help with it. There are two vents on the bottom one on each side and two at the top one on each side as well. How do you use these to increase heat inside? Do I need to have the bottow vents open all the way as well as the ones on top or do I need to close the ones on top a little? This has always been my down fall on understanding grills and smokers. Also any suggestions on any upgrades for this smoker?