It's that time again when Mac users make their New Year's resolutions. How about a simple pledge to keep your computer clean? I'm not talking about deleting cache files or removing old apps you no longer use. I'm talking about your Mac's screen and keyboard, or its dusty, grungy innards. It's not difficult to do, but keeping a clean Mac can help it run smoother, and keep you from getting sick as well. Here are a few ways you can keep your Mac looking new and fresh.

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