Well I just went up on the roof to take a look at how much creosote my liner had in it and I was pretty happy with the way it looked. I did run a poly brush through it last summer just for piece of mind and havent cleaned it since. This was the first full season for this liner and thats burning when I get home from work and 24/7 on weekends. Being new I wanted to post the pics to get some feedback on what you guys think, does this look good or bad for one season? I burned alot of red oak that was seasoned for about 10 months ( small splits) and ash mostly. I did use about two tubs of creosote remover from Menards this year. It will get cleaned this summer when I install a new insert. This is an uninsulated liner too, thanks for any input. 64% efficent wood insert.