Product review (5 stars): Saved my Dryer
I thought my dryer was dying. I had to run my clothes through the dryer twice at the longest setting to get them dry, 3 times with blankets. I was told vacuuming the vent hose should help but, it wouldn't even remove the lint at the bottom of the vent pipe (my vent goes straight up about 20 ft).

I got this kit and the 12 ft extension set. I planned to hook my vacuum up inside and feed the brush in from the roof. when I took the cap off the vent pipe, it looked like it was packed with gray cotton candy. After pulling out what I could by hand, I called my son and had him turn on the vacuum. I ran the brush down 3 ft and went inside to see how much came out. The vacuum was empty, I had plugged up the vent with lint...

Plan B: I plugged the dryer back in with the included adapter, turned it on, grabbed my safety glasses and shuffled back up on the roof. I made it rain lint for 7 extensions worth of drilling. While the vacuum would have been cleaner, the feeling of gratification you get from the geyser effect is well worth the extra clean up IMHO.

A bit of advise: You don't need a massive drill for this I used a 12v NEXTEC 3/8" drill. The rods will fit(barely), and go slow.
Be careful when loosening the drill. About halfway down I bumped the reverse button when adding an extension
and the last 2 rods came apart. Luckily the vent was so clogged, the brush didn't fall all the way down.
If you have to get on your roof, take a look around. I noticed the wood on my chimney needs to be replaced.
Use this opportunity to replace a foil flex hose "fire hazard" with a rigid aluminum hose.

The dryer runs like new again. Now I have to break the habit of starting it a second time.