Product review (5 stars): Rotary dryer cleaning system
I read several of the reviews before I purchased this product. Since there was more positive then neg, I bought it.  For the negative reviews, I believe they may have not read the directions.  I never reversed the drill, as the directions tell you to always go clockwise.  My vent was so backed up that it was leaking water from the vent at the wall attachment.  The vent on the roof was quite inadequate.  I replaced that, cleaned my vent, had lots of sludgy looking stuff that did not resemble lint. And pulled out a large shoebox full yuck.  Bottom line it worked like a charm.  I never once thought that I might loose a rod in the vent.