-
The correct way is to use a pencil to scratch back and forth on the key tooth shape, grind out some pencil powder, and then insert the side with pencil powder into the lock cylinder, pull back and forth, it is very slippery, do not use cooking oil, this will damage the lock cylinder, and when the weather is cold, you will be prone to problems
-
Turn slowly, pull while turning, it must be that the teeth and teeth inside are not aligned, and you can't use brute force. It is best to pour some sesame oil into it.
-
Open it a few more times to grind those burrs off the lock.
It is the egg bead spring in the lock that is broken, so it cannot be synchronized with the key notch.
The quality of the lock cylinder is so poor! Just swap out the lock cylinder! The lock cylinder is replaced with the key being replaced. This will generally solve the problem! Or replace the entire lock body!
It could be that the spring of the lock cylinder is broken, or something inside the cylinder is stuck. >>>More
Maybe the lock cylinder is broken, you try it first, put some pencil powder into it, don't use oil, the lock breaks quickly with oil. If you still can't screw it, find someone to change the lock cylinder.
I think it's the insurance closed, you can open the insurance. Then it will open. You can give it a try.