Kung Fu Maintenance demonstrates an excellent way how to lube deadbolt locks to stop keys from sticking in the lock.
Sticking Deadbolt Lock Lube
Got a lock that’s tough to work. What you want to do is take some graphite lube and just puff it into the lock. Right here. A little tube. Couple squirts. Insert your key. Back and forth. Like so. Give it a few twists and your all lubed. Good to go.
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