1, locks can not be exposed to rain for a long time, rainfall contains nitric acid, nitrate, will corrode the lock.
2, usually often keep the lock clean, do not let foreign objects into the lock cylinder, resulting in opening difficulties or even unable to open.
3、Regularly inject lubricant, graphite powder or pencil powder into the lock cylinder to help reduce the oxidized layer left behind due to the long time of use.
4, pay attention to the thermal expansion and contraction caused by the weather (wet in spring and dry in winter) to ensure that the lock body itself and the key gap reasonable fit to ensure the smooth use of locks.
