Review on 🧹 Efficient and Easy Cleaning: 20-Feet Dryer Vent Cleaner Kit with Reusable Nylon Brush and Drill Attachment by Clint Blackman

How effective this is depends on your facility. The more curves, the more difficult it is to negotiate them. If you have flexible or even semi-rigid duct segments, these are not ideal. Fasteners are typically metal tapes and force applied to this device can separate the connections. Although it's pretty effective. I pulled out a ton of lint. I did 3 passes or so until I got the fluff back. The drill is pretty important, but don't go crazy. You will need pliers to separate the ends of the nylon rods. The bars are pretty strong, but they can be damaged by overly aggressive drilling - I'd set it to low torque if you can. I ended up crimping this on both ends of the vent and also found a seam down the middle (in my basement) and routed it both ways. Generally a ton of heaps. The hair dryer works much better, although I thought about getting an extra fan.