In June I spilled coffee with sugar and cream on my MacBook keyboard. I took it to the apple store and they checked it and said it had not been damaged at all.however some of my keys have been kind of sticky even though they cleaned them.i can type with them but they just feel odd.my question is are they going to corrode my computer or make my keys stop working?the guy at the store said my Mac was really clean inside and had no damage but im still worried.....should I be worried or am I just paranoid as this was back in June.