1. The lock can not be exposed to rainwater for a long time. The rainwater that is lowered contains nitric acid and nitrate, which will corrode the lock.

2, usually keep the lock clean, do not let foreign matter enter the lock core, resulting in difficulty opening or even open.

3. Inject lubricant, graphite powder or pencil powder into the lock cylinder regularly to help reduce the oxide layer left over from the use of the lock.

4. Pay attention to the thermal expansion and contraction caused by the weather (wet spring, dry in winter) to ensure a reasonable fit between the lock body and the key to ensure smooth use of the lock.