I've wanted to clean the dryer vent for a long time as I sometimes see lint outside the house near the vent. I pulled the vent off my dryer and used that as well as a shop vacuum. I was absolutely amazed at how much fluff there was. I have a 3 year old Samsung dryer that throws a lot of lint through the lint screen. I will continue to use this brush every few months to avoid pilling. It also fits well and bends nicely to get into the dryer where the lint trap is. The lint sticks to the brush, which is fine to remove from the dryer, but you really have to pull it out with your hands, it's not easy to remove with a vacuum.