I wanted to say how important it is to have a longer dryer vent n some kind of schedule for cleaning, clean vents means longer lasting dryers and no chance of a vent fire, drying times are also significantly faster.

Shorter vent that pop out to the side wall can easily be cleaned by the home owner, a dryer vent cleaning kit is usually less than $30 and available from most hardware stores.

Longer vents should be professionally cleaned, best practice is to choose a company that also cleans the dryer interior.