Product review (5 stars): I got so much like my, dirt and fluff out of my dryer ...
OMG!  I got so much like my, dirt and fluff out of my dryer vent with this!  One thing I would point out - instructions say it could be used by hand or with a drill but I don't think by hand would be nearly as effective. Definitely recommend using a mask because it makes a lot of dust when you start getting that built up gunk out of the vent. My husband was very skeptical but when he saw how much stuff came out of the vent line even he had to admit it was exactly as advertised, if not even better. Highly recommend this product.