Review on 13-Piece Dryer Duct/Vent Cleaning Kit, Lint Remover | 24 ft Extension | Synthetic Brush Head | Use with/without Power Drill (12 Rods + 1 Bush Head) by Fisseha Rodgers

Works great. You have to move it back while drilling. It is best to use the drill at low speed with the clutch almost properly adjusted. You can't see the vent/pipe down so you're not sure if the walls are smooth or slightly curved to fit together and this may result in you trimming the ends of the drill bit to keep them from slipping . I found the best method was to use to the max, come back, then detach and take the brush, detach and go back down. The brush gathers everything into a lump, so pull back the end while the poker helps break it up. For better cleaning, I also blew through the ventilation pipe with my workshop vacuum cleaner while I was working. Really surprised how much time was spent on this 12x run. The product worked for me, let's see how the dryer works now as it took a long time to dry the clothes.