by viduata » 21 Aug 2010 17:05
First response: Don't practice on your front door.
Second response: The lock on your door handle probably only needs to turn 90 degrees to unlock. (If you think about it, you only rotate the thumb turn 90 degrees, right). After that, you just turn the handle. There is a chance also that you're going in the wrong direction, but, since this lock is yours, right, you'll know exactly which way it goes with a key.
Also, the deadbolt requires a LOT more torque to open, particularly if the bolt itself is poorly aligned in the hole.
This is why you don't practice on your front door: If you over-torque your wrench opening the deadbolt, now you have a tension wrench jammed in the keyway, and have fun explaining that to your landlord.