Hello everyone, I am new to the forum and the proud owner of a new cheap horizontal offset smoker. I am having issues maintaining any type of heat and I would like some tips. I have created a vented baffle, I have fire bricks in the cooking chamber to distribute the heat evenly, I have extended my exhaust 1" to the cooking grates, and I have insulated the edge of the cooking chamber. In my side firebox the lit lump charcoal sits on the bottom; so I may have an issue with air flow underneath the coals. Whatever it is I can not maintain any time of consistent heat. What am I messing? What am I doing wrong?