So I installed my liner last year. I ran 3 months of heavy burning, first using a jotul 602, then using a 602fb (EPA version). Finally got on the roof to sweep and insulate the chimney. Ended up with about 3/4 full of a plastic grocery bag. Seemed like an awful lot. Now, I did burn pretty much whatever I could get my hands on last year, including some mediocre pine and some likely wet oak. Hopefully I'll avoid that this year. Question is is that amount of creosote dangerous? My chimney is about 25'.