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offer a strong security level to keep you and your family safe from intruders. As with all doors, they can warp and swell over time, which can cause problems with the locking mechanism. The cylinder lock may become sticky. This is usually due to the lock being improperly lubricated. A Locksmith can replace, repair or service the door cylinder and get your door functioning again. Damaged Cylinder It's an extremely stressful situation when your locks become damaged in a burglary