The newly decorated house contains a large number of corrosive gases, especially the paint will emit corrosive gases such as formaldehyde, which seriously affects the service life of the lock, even the corrosion lock. Ventilation every day, keep the room dry. Remove dust and other rubbish on the surface of the handle lock, wipe the handle and lock body with dry cloth, and do not use wet cloth or acid-base detergent. In the process of daily opening, the handle is held to screw the locking tongue into the lock body, and then release the hand after locking. Do not hit the door with force, otherwise, the service life will be shortened.