If you are a Apple Fan then iam sure you would be a owner of any of their most sold products ie Apple iPods ie Nano or Video iPod, Apple iPhone , iMac 20″ & 24″ or else the Apple Macbook series all of which have some kind of display screen which requires your efforts to stay clean and offer you with super crisp display. Here is a tutorial from Apple Support which teaches you with the perfect guidelines to follow when you need to clean Apple products. Link

Cleaning the display

• Disconnect the power cord and verify that the product is turned off.
• Use a soft, dry, lint-free cloth, or the cleaning cloth that was provided, to wipe dust from the screen.
• If needed, lightly dampen the cloth with water only and wipe the screen.
• Do not spray liquid directly on the screen.

Cleaning the enclosure

• Shut down the product and disconnect all cables.
• Use a damp, soft, lint-free cloth to clean the exterior. Avoid getting moisture in any openings.
• Do not spray liquid directly onto the product.
• Do not use aerosol sprays, solvents, or abrasives that might damage the finish.