My MacBook Pro is about 6 months old, and its a early 2008 model. On the wrist wrest thingy, there are little black dots concentrated in one area. I heard that it is caused by acids in you skin/sweat. I have previously read another thread about it, and it had pictures of a much, much worse case. What Im currently afraid of is that it will get progressively worse as it ages, and I would never be able to get it replaced. Here is a picture: Should I call Applecare about it, or just let it be?