Move three: Scrub the Vent Include Wash off the outer vent include using a cloth with heat h2o plus some dishwashing liquid to get rid of Dust, dust, and soil. Rinse with h2o and reattach the vent cover.How frequently to wash a Dryer Vent Depending on how frequently you use your dryer, Stick to the methods under to clean the dryer vent a minimum of