The answer to 'how to maintain dryer vent' is to regularly clean and inspect the dryer vent to prevent lint buildup, which can lead to fire hazards and reduce the efficiency of your dryer. This involves disconnecting the vent from the dryer, using a dryer vent brush or vacuum hose attachment to remove lint, and checking for any blockages or damage.
It's recommended to clean the dryer vent at least once a year, or more frequently if you notice reduced airflow or longer drying times. Additionally, you should visually inspect the vent opening outside your home to ensure it's not obstructed by debris or animal nests.