The handle is our daily contact with the most frequent hardware accessories, it is easy to be contaminated with fingerprints, sweat and dust. Wipe the handle with a soft, damp cloth every day to keep it clean and tidy. Every 6-12 months, check the firmness of the handle. Check whether the connection screw between the handle and the door is loose. If it is loose, tighten it in time.
You can simply clean the surface of the lock once a week, using a dry soft cloth to wipe away dust and fingerprints. At the same time, check whether the lock tongue can pop out and retract normally, and whether the key is inserted and pulled out smoothly. Every 1-2 years, the lock core should be deeply cleaned. You can use a special lock core cleaner or a small amount of pencil lead powder (graphite) into the lock core, and then insert the key and turn several times to clean the dirt and impurities inside the lock core, and play a role in lubrication.