Hey guys... Couple'o newbie questions, I just got a white MB403LL better known as the 13.3 2.4Ghz MB: - How can I keep it clean if it rests all day on top of my desk (closed while I am at work, and open at night when I am recording music using it). I am afraid dust will go in the large gaps in the keyboard. - Do you recommend I get the softcase? - What is your opinion on the keyboard cover? useful?