Just got the new 13" MacBook Pro a few weeks ago. Since then, the trackpad has gotten slightly dirty. Sometimes it's a little sticky because my fingers are a bit moist/not completely dry. I have a little Apple cloth originally intended for my iPod Touch, but that only really cleans the screen of my MBP. What's the most efficient way to clean the trackpad? I don't know how water would react with it (if I used a damp cloth). Being a newbie to Macs, what do you guys use?