Product review (5 stars): Good system
This brush did a good job of breaking the lint loose so it could be removed. I have a long vertical dryer vent so a little blockage has a big effect on drying time. Cleaning the vent duct was much easier and faster with the brush. I kept the drill on slow speed as I pushed the brush into the duct. Then after running the brush back and forth several times at a slow speed I blew the lint out of the duct.