To clean a monitor screen, it is important to use a soft and clean microfiber cloth. Avoid using paper towels, tissues, rags, or old cloth, as they can be abrasive and scratch the screen. It is also important to avoid using corrosive substances such as alcohol- or ammonia-based cleaners, as they can damage the screen by stripping anti-reflective coatings or causing clouding. Instead, use distilled or still water, or a mixture of 50 percent distilled water and 50 percent white vinegar. Do not spray liquid directly onto the screen, as excess liquid can seep into the screen and damage it. To clean the screen, gently wipe it with the dampened microfiber cloth, making sure not to press on the screen while cleaning.