To replace old outdoor vent covers ... to the siding and cut through the caulk around the edges. Pull out the dryer vent cover, scrape away old caulk and dirt, and then wipe the siding clean ...

One of the biggest home fire hazards is a dirty dryer vent, but even if clogged dryer ducts don't lead to household damage right away, they are being wasteful of your time, energy and money.