Broken key
Can you spot a piece of the key sticking out of the lock? Use a bit of oil or WD-40 to grease the lock with. WD-40 is the best option because you can use the long, thin spout to spray as close to the key as possible. Carefully spray the oil into the lock, in between the key and the cilinder. Don’t be afraid to be generous with the oil. Next, use a pair of pliers to pull out the broken key.
Too deep
Has the key broken inside the lock and are you unable to reach it? Don’t despair, because you can still easily fix it with a couple of tools. For example, you could use a strong magnet to pull out the remnant of the key. Of course, not everybody owns a strong magnet and the key might be too stuck for this trick to work. You can also use a pair of tweezers or a straightened out paperclip. If all of this isn’t working, you might consider putting a little bit of glue on the other half of the key and then pushing it back into the lock, straight onto the stuck piece of key. Once the glue has dried, you can pull out the key in its entirety.
Not having any success with these methods?
Saw blade
This method is sure to work. You will need a small saw blade from a jigsaw, like the one in the picture below. If you can, go for a metal saw blade. The blade needs to be very thin with very fine teeth. Use a pair of pliers to cut the saw blade, so the end also has teeth and isn’t smooth. Make sure there’s a large tooth at the end of the blade.
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