DON'T use a jeweller's cloth, please. They come loaded with really fine dry abrasives, usually jeweller's rouge (finely ground mineral ore in a grease base, yum), and they are definitely not lint free ...
You should clean your MacBook screen with the recommended materials, like a clean, lint-free cloth with water. The screens can also be wiped with certain cleaners intended for use on computer monitors ...
Heat is your computer's worst enemy. Over time, dust buildup inside your computer could undermine its cooling efficiency, resulting in shorter life spans for your computer's components. Ed Rhee, a ...