Product review (5 stars): My husband sang the praises!
We got a strange code on our dryer display (since when did dryers have displays! Ok, I admit my age...) and my husband figured out our dryer exhaust vent was clogged (probably for years, the old dryer didn't have a display. Sheesh!).  Anyway, he used the Deflecto Dryer Duct cleaning kit and was thrilled - super easy to use (and he's not exactly mechanically inclined) and pulled out gobs of dryer lint effortlessly. No more codes!