One of the many reasons I've always like the MacBook Pro is that it has a protective glass between me and the LCD panel. The LCD panel on the 13" MBA looks amazing, so clear, such high resolution for the panel size - all positives. BUT what always happens over time, is that the LCD panel collects dust and other odd marks. And on the MBP it's easy - window cleaner and I'm done. So is it difficult to keep the MBA panel clean? If it does develop the inevitable 'odd marks' on it (seems to happen most ofter during winter, funnily during flu season), is the panel easily cleanable? Will cleaning the LCD panel impact on the long term longevity of the panel? Any help would be super appreciated.