Getting a key stuck in a lock is frustrating and can even cause panic in certain situations. There's a reason why your key is stuck. Once you remove the key, take steps to ensure that it doesn't happen again.
Remove the two screws from the trim plate and edge plate, then remove the trim. Remove the lock assembly. If it doesn't come out easily, pry it out carefully with a small pry bar.
Remove the cylinder retaining screws from the back of the deadbolt, then pull the tailpiece to remove the cylinder. Push a bent safety pin through the back of the cylinder to release the broken key.
Submerge the assembly in mineral spirits or turpentine. Put on rubber gloves, and clean the lock with an old toothbrush. Allow it to dry fully, then spray it with a petroleum-based lubricant to prevent the key from sticking in the lock in the future.
- "Windows & Doors"; Ron Hazelton et al; 1998
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