- Regular cleaning with citric acid every 2 to 4 weeks. If your water has high TDS or is hard or mineral rich, cleaning may be needed more often. - Keep the membrane damp daily to maintain filtration performance and help prevent fouling. - Long pressing the button opens the cleaning mode, designed for weekly maintenance. - This product supports membrane based filtration systems that require periodic citric acid cleaning and daily membrane moisture. - Use scenario: in a home with moderately hard water, follow the 2 to 4 week cleaning cycle to maintain efficiency and taste. - Use scenario: in a home with very hard or mineral rich water, increase cleaning frequency according to water quality to prevent buildup. - Use scenario: in a small office with regular daily use, rely on the weekly cleaning mode to simplify routine maintenance.