1, do not drop the oil into the lock core. If the key is not opened, you can put some pencil core chips into the keyhole.
2, if the inadvertent will be a spherical door lock inside the house to rotate 900, that is, permanent insurance, at this time can only be opened with the key, only the reverse clockwise rotation of 900, can be restored.
3, when normal use, if there is dirt, dry cloth (or add a little water) to remove, do not use detergent and other chemicals scrubbing. Otherwise, damaging the exposed protective film will cause discoloration.
4, when the door is closed, it is best to hold the handle, lock the tongue into the lock body, release the door and release it again, do not hit the door hard, otherwise it will reduce the service life of the lock.