So You've Bought Dryer Exhaust Cleaning Kit ... Now What?
https://www.goodreads.com/topic/show/20089290-is-tech-making-dryer-vent-cleaning-services-houston-better-or-worse
This is essential as any bent hosing lowers efficiency of the dryer. Afterwards, they wash away the dust on the outer layer of duct or vent. Due to this flow of sizzling air lowers and the clothing are not dried