i cleaned and summer-ized my NC30 this morning. I cleaned mid-winter so I only got about 1/4 cup of soot out of the chimney (I use a conventional top-down brush) and I never have problems with creosote because I burn hot with dry wood. When I removed the baffle boards BEFORE brushing, I noticed a little pile of creosote puffballs on the boards - ranging from lead shot size to about the size of a pea. The amount was just a few of them like maybe a tablespoon- fluffy spheres of burnt creosote. You guys ever see anything like that?