It's been about 3 months since I got my wonterful iBook. I didn't purchase an iSkin at the time but wish I had. The once pure white keyboard has shades of brown and grey ... as does the trackpad. How does one go about cleaning it and restoring it to its original shine and splendour? Will something like lenscleaner/windex do the trick? or what about high pressure keyboard spray?A lot of the keys themselves are slowly discoloring.. Many Thanks!