1. The lock cannot be exposed to rain for a long time. The falling rainwater contains nitric acid and nitrate, which will corrode the lock.
2, usually keep the lock clean, do not let foreign objects enter the lock core, resulting in difficult to open or even unable to open.
3. Regularly inject lubricating oil, graphite powder or pencil powder into the lock cylinder to help reduce the oxide layer left by using it for too long.
4. Pay attention to the thermal expansion and contraction caused by the weather (wet in spring and dry in winter) to ensure that the gap between the lock itself and the key is reasonable and that the lock can be used smoothly.