The answer to 'how to maintain dryer vent cleaning' is to regularly inspect and clean your dryer vent to prevent fire hazards and improve efficiency. Dryer vents should be cleaned at least once a year, or more frequently if you notice reduced airflow, longer drying times, or lint buildup.
Start by unplugging the dryer and disconnecting the vent hose from the back of the unit. Use a dryer vent brush or plumber's snake to loosen and remove any lint or debris inside the vent. Be sure to clean the entire length of the vent, including any bends or elbows. Vacuum up any loose lint, then reattach the vent hose and restore power to the dryer.