It seems I'm having some trouble with my lock at school. I have a standard lock, at least I think I do, it's Master. It used to open just fine but now I'm having difficulties. My teacher is constantly having to unlock it with a key and she seems mad, but she won't get me a new one. Could I be doing something wrong? First I turn the dial to 0, then I turn it three times, then turn it right to the first number, then I turn left to the second(passing the first number once), then right to the third. When I close it I keep the arrow lined up with the 3rd number, close it, then spin it around a few times to set the lock. What's causing it to constantly get jammed? Any suggestions?