Bear in mind when just one load of laundry used to dry in forty minutes? Now it will take 70—and maybe even a second cycle. That aggravating slowdown is probably the initial indicators your dryer vent requires attention. Make sure you use a skinny hose attachment to extend the vacuum https://www.google.com/maps/d/edit?mid=1Y6FoBp66BALv8qFQFh6QdMpJqLXOkQM&usp=sharing