Scrubbing method: push the paperclip in gently at the lower end of the keyhole, then lift it back and upward. Repeat in a circular motion while increase the pressure on the Allen wrench slightly each time, until you feel the lock shift. When this happens, keep the pressure steady as you repeat the motion, until the door unlocks. Pin by pin method: If you can’t succeed with the scrubbing method, keep the pressure on the Allen wrench slight and steady while you gradually push the paperclip in. When the paperclip makes contact with a pin, try to catch it on the bend and lift it upward until it clicks into place. Repeat with additional pins until the lock turns.
Repeat this with all hinges. If the pin won’t come out easily, you may have more success forcing it out with a Phillips head screwdriver.
If you are using a friend’s key, call and ask him about it. He is likely to know the door’s idiosyncrasies.
If you’re trapped in a room, use any oil you have available, or rub the key with a graphite pencil tip.
