To check if the key has been re-cracked:
- Never use a bent or broken key.
- Apply a thin layer of grease to the lock twice a year.
- Do not try to force the key if it does not turn properly; this is a sign that the mechanism requires maintenance.
With these   5 simple tips,   you can solve the problem in seconds, without having to remove the lock or call a locksmith.
A little peace of mind, a good tool, and your door will open without damage!