My Mac, iPhone, iPad, and Apple Watch screens — not to mention my TV — constantly need their screens cleaned. Instead of buying expensive cleaning products, however, I mix my own.
Take a spray bottle and mix it with one part plain white vinegar and one part distilled water (make sure it’s distilled). Spray the liquid on a clean, lint-free cloth such as an old t-shirt (paper-based products like paper towels can scratch the screen) and go to town cleaning those screens. Be sure not to spray the solution directly on your screens, as it can drip down into places it shouldn’t go.