In fact, Lockey advises against it. Performing maintenance on the M-210 can cause accidental damage to the lock and even result in a voided warranty. Users should never oil, lube, or spray their locks with anything soluble. Do not attempt to grease the tumblers inside the lock either. Lockey keyless locks are painstakingly designed and constructed to the highest performance standards. However, if you find yourself in that rare situation when a lock is malfunctioning, contact the manufacturer.
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