Product review (5 stars): Gardus Lint Eater Kicks Butt
We bought a 22 year old house last summer and shortly thereafter an LG set of washer dryer.  The dryer kept on stopping due to a blockage alarm.

Enter, Gardus Lint Eater. Easy to follow directions, 12 feet of rod, and adapter for the vacuum.

I have about a 20 foot run, so against better judgement I hooked up my Toro leaf blower to the dryer connection inside the house. This was made simple by the vacuum adapter and some duct tape (which hold the universe together). A crank of the dial and 180 decibels later it was blowing, really blowing. Think of Spaceballs when meter maid goes from suck to blow and all the air goes back into Druidia. I digress...

So next it was time to start brushing from the exit side. As I did this the lint was blow outside which is nice and much cleaner than ending up with it in the laundry room.  I used all 4 rod pieces and cleaned the 12 feet from that side.  Next I went inside and disconnected the leaf blower and brush from the laundry room towards the exit side. So I was able to clean 24 feet of duct with only 12 feet of rod.  One last blow with the leaf blower and it was all done.  LG and Wife are happy again!