At one point or another, we’ve found ourselves in situations where our keys are stuck in the lock. For sure we’eve also done some diy tricks to help solve the problem. Here are some tips that might help remedy the situation.
Push the Plug
The keyhole plug in a pin tumbler lock (found in deadbolts and key-in-knob locks) is just one part of a larger locking cylinder. Whats visible to you, the face of the plug, is the small circle surrounding the keywayand your stuck key. Now, if this plug is loose, it can move slightly within the cylinder and prevent the pin tumblers from aligning, which makes it difficult to unlock the door or remove the key. Push your key in as far as it will go and turn it so that the keyway slot is in the exact position it was in when you inserted the key; this is the correct position for the pin tumblers to align in the cylinder. With your other hand, use the tip of your finger to push firmly on the face of the plug next to the key. The light pressure will prevent the plug from shifting as you gently twist and pull the key out.
Sourced from: https://www.bobvila.com/articles/key-stuck-in-lock/
Graphit or WD40
This is one of the important household items you should keep in your list next time you’re out doing shopping. Graphite and WD40 are pretty much available on the hardware section of any supermarkets.
This method requires a bit of forward planning. Youll need to keep a small tube of graphite or a can of WD40 in your car (WD40 is great to have for a lot of things around the house and not just for your car). Drip a very small amount of graphite or spray a very small amount of WD40 (did you notice I said very small) into the lock cylinder and then try the jiggle method above until the key stuck in the lock slides out.
Sourced from: http://ezautoremote.com/2013/08/key-stuck-in-the-lock-3-ways-to-remove-it/
Call a Professional
Now that you’ve tried some diy tricks and still find yourself unsuccessful in getting the key out of the lock, it’s high time you call a professional locksmith to help you. They can remove the key from the lock without causing any further damage. They are equipped with all the right tools and have had valuable training and experience to do the job efficiently. Visit this site for more information about what to do when your key gets stuck in the lock.