Product review (5 stars): Works perfectly
The package comes with 4 flexible, fiberglass/nylon? rods that thread into each other perfectly. The vent cleaning brush also has a set screw that is used to make sure the head does not come off.

I decided to clean from the vent exhaust inwards, towards the dryer, because I didn't want to go through the hassle of reattaching the flexible connections.

- I turned on the dryer in continuous, air-fluff mode.
- I attached ONE rod to the brush. I used the high-torque, low-rpm setting on my drill to get the maximum cleaning power.
- I fed the rod in by hand, inches at a time, making sure there was no slack between the drill and my hand, otherwise the rod would bend and twist on itself. That could make the rod break.
- I made sure each vent section that I could reach with one rod was completely clean, BEFORE attaching the next rod and pushing in further.
- I ALWAYS ran the drill CLOCKWISE as I SLOWLY pushed in as far as I needed to, and then pulled out the same way.

I was amazed at the junk that accumulated over 20 years.

I read some comments about breaking rods. My vent has two 90 degree turns that had no problem being cleaned.

Since the package comes with the gutter downspout head, you can use the same technique to chew up leaf clogs. No need to go up a ladder. I used a plumber's snake in the past.

The package is kind of pricey for a single use, but it's cheaper than hiring someone, And, you can offer it to family and friends.