Usually the lock is too dry.
Key doe not slid easily into door lock.
Select the size of specialty tool from the kit best fit for your problem lock and slide the slim implement along the recessed groove of the key as far as it will go.
If it is hold the key with a heavy glove and heat it with a match or lighter and then work it gradually into the keyway.
A dry graphite lubricant will lubricate the inside of the lock making it easier to unlock.
Sometimes pieces in locks fail.
Once in place turn it so that.
Trying to remove it yourself without the right tools when you can t see what you are doing could damage the lock.
Then though it may be difficult at first work the key in and out of the lock.
Stuck pin due to dust or wear.
It may have been tampered with if the plug was rotated substantially.
Slide the doorknob off the spindle pull out the lock mechanism and remove the latchbolt from its hole in the edge of the door.
Slide the key in the lock and tap lightly on the.
Not wd 40 may help.
The tip of the key is blunt or dull due to abuse.
Lubricating the lock with non destructive oil i e.
He also does not like wd40 for locks.
Get the security you want without the headaches by correcting a sticky keyhole tumbler and key.
With the door open use a phillips screwdriver to take out the two connecting screws that are located by the doorknob on the inside of the lock.
Practically everything else but not locks he showed me to take some olive oil not veg soy or corn and dip they key in it.
In the future keep a lock de icer on hand.
The key is bent and the lock is straight.
Spray the door key with a graphite based lubricant.
Repeat heating and inserting the key until the ice has melted.
If lubricating the lock did not work and you suspect there is an obstruction you should call a locksmith.
Something is stuck inside the lock.
If your key will only go into the lock partway there may be an obstruction blocking it.
Try to see if you can rotate the plug back to it s proper locked position with something.
If it unlocks easily inside it may be a simple fix.
Try these simple steps.
Assuming the door lock is hard to unlock with a key because it is dirty or gunked up inside and not damaged your best bet is to use a dry graphite.