Spent 4 hours on a chimney in Duluth that turned out to be a squirrel nest, not a blockage
Pulled the brush through 6 times, ran the camera down twice, and even pulled the cap off the top before I figured out the scratching sound in the flue was a family of squirrels and not a broken tile, so has anyone got a better trick for telling animal noise from creosote chunks without wasting half a day?