Screens are perhaps the easiest thing to clean. As long as you have the right products, it's hard to mess up. The product I use is Whoosh screen cleaner kit, which comes with three microfiber cloths and two bottles of the cleaning solution. All you do is spray the solution on a cloth, then wipe down your dirty screen and then dry it off with the other side. It's great for PC monitors, laptop displays, tablet screens, and even the Nintendo Switch--it also works well for eyeglasses, which is great for me as I'm a four-eyed nerd with very dirty lenses.