I've had my DS Lite for a little over a year now so I believe my warranty has expired. Recently though, I've noticed that my 'A' button is really worn down. I don't know how to explain it well, but there's little to no resistance when you press down on it compared to the other buttons. It still responds though when you press down on it, it's just really weak. Is there anyway to fix it without opening up the console? If I do have to open it up, how can I fix it?