Just realized tday whenever I push the b key, it feels wierd. It's like a lot softer more squisher, and kinda goes down on an angle to the top left of the key. Rest of my keys are fine and when I push down on it its nice and firm. What is wrong with it? is there any way to fix it? Also I see these black speckle dust like stuff on the lbottom left side of my macbook pro, kinda where my left palm is when Im typing, is there anyway to get rid of that stuff? Thanks.