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4. Lubricate the lock
Spray the lock with a little   lubricant  (WD-40-40) or, if that doesn’t work, a drop of cooking oil.
This will make the metal slide more easily and reduce the risk of damaging the cylinder.
After oiling the lock, try the previous instructions again: the key should come out more easily.
5. Make a homemade crochet hook
If none of these tools work, make a small   hook out of a wire   or paper clip.
Bend the end of the wire to create a small hook, insert it into the lock, and try to hook the broken key onto it to remove it.
When should you call someone?
If, despite all these methods, the key sticks or the lock cylinder is damaged, it’s best   to contact a qualified locksmith   .
This will prevent permanent damage to the lock and the much more expensive replacement.
