I had a yogurt in my bag with my MBP (stupid, i know) and it busted open. Yogurt got in the USB port as well as the two audio jacks and the power plug. I cleaned it up after it dried, and everything works fine except for the USB port which seems to be completely dead. How hard will it be to fix this? can i switch the port myself or do i need to have apple do it? what all goes in to this?