So my Superdrive seems to be failing me. I put in a CD or DVD and about 75% of the time it spits the thing back out at me. I've bought a lens cleaner but that doesn't seem to help at all. If I take this in, is this something Apple will need to ship my Macbook Pro out to get fixed, or can they simply do this replacement in store? I can't go without my Macbook right now as it's all I use for school. Thanks!