Product review (4 stars): Dryer Lint Brush
We were amazed at the lint that came out, it's a wonder we didn't have a fire.  scary.  My only complaint is:  we used the cleaning kit with a drill from the inside and outside vent.  we think there is some stuck in the middle......compacted and won't come out : (  We ordered a longer brush....hoping we can attach to this kit and force it out.  Still waiting for longer brush to arrive.  Hope it works or we will have to pay for professional cleaning.  So if you have a long pipe be careful you don't push tons of lint to the middle.  We even tried using a coat hanger on the end to loosen, didn't work.