While the device is off, wipe the screen gently with a soft microfiber cloth or a dry eraser. Avoid pressing on the screen, as that may burn out pixels. Remove stubborn spots using a cloth dampened with one part white vinegar and one part distilled water.
Do not wipe the screen with paper products or a shirt; they may scratch the screen's surface. Do not use Windex or other ammonia-based cleaning products, nail polish removers, or paint solvents on the screen, as they can cause permanent damage. Avoid spraying liquid on the screen; it may drip inside and damage the equipment.