Product review (5 stars): by far the easiest way to clean a dryer vent short of paying someone else.
We have a dryer vent that is about 15-17 feel long. a few years back i used one of the flexible brushes but the vent was so clogged it didn't work well.

Now this time the vent was not that bad, but with the shop-vac adapter at one end and using an electric drill on the brush rods took me no time at all to make it work.

just we warned, keep your drill going the correct direction, if you reverse it you will unscrew the rods or brush (tho the brush has a set screw that should prevent it falling off). i will be buying the rod extension kit.