Why does it take so long?

At a recent inspection I came across this dryer vent that was packed with lint. This is a functional concern as well as a safety concern. As the vent is blocked the dryer has to work twice as hard to dry close and may require multiple cycles as there is no place for the moist air to go. Lint is also very flammable so this is a fire concern as well.

Pro-Tip - Dryer vents should be leaned at least annually to help the system vent and running effectively as well as mitigate fire concerns. ​