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How to Properly Replace a Keycap The key may begin to move in a way that is excessive when it is nearing its expiration date. Replacing the key will ensure it is working smoothly and prevent any unexpected lockouts or damage to the locks or ignition system. To repair a key properly, it is important to pinpoint the issue and make use of the appropriate tools. The proper disassembly of the key and cleaning and lubricating the switch, and re-aligning it can resolve many problems. Keycaps