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I'd suggest Windex as well. The screen is glass, and Windex is glass cleaner so I would think it would work well. I've used it on my iMac before and it makes it nice and clean.
 
I hear the squeegees at the gas station work, as do windshield wipers.

Seriously though, what doesn't clean glass? Just wipe it like you would any mirror or piece of glass.
 
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