My macbook's magnet has died, or so it seems. It barely holds the top case and bottom case together, and does not "snap" shut until they are less than 7 mm apart. if i turn it upright the two side pop about 5mm apart and do not close until at less than about a 60 degree angle to the desk. Is there a way to remagnetize them, does this warrant a trip to the apple store, or do i just deal with it? The computer is 14/12 months old, manufacturing/purchase.