Two questions. First, my Dynaglo offset smoker is still a little tempermental with maintaining consistent temperatures after sealing the firebox and cooking chamber door so I'm considering adding some firebricks which I understand will help retain and help with consistency. Is the best strategy to just line the bottom of the cooking chamber with 1 layer of firebricks? Is there anything else I could be thinking of? Second, I've read in a couple places that firebricks could lead to some issues with bacteria build up but I'm quite confused as to why this would be the case? I don't clean out my smoker after every smoke, which is how most people operate theirs if I'm not mistaken. What would a firebrick add to the environment that would suddenly make bacteria a potential problem (if anything)?