[QUOTE=Carbon;2334870]I've never cleaned the inside walls of my UDS. It has a thick layer of built up gunk on it, top to bottom. Could be my imagination but I think all that gunk helps insulate the drum and maintain steadier temps. My UDS seems to perform better, the dirtier it gets. :)[/QUOTE
Yep, same with mine! I think that goes for pretty much any cooker, the better seasoned it is, the easier it is to maintain temp.