Tim Brookes writes: “Laptops get moved around a lot, which means they’re often smudged from opening and closing the lid. If you don’t take care when cleaning the screen, you could scratch it or damage the protective coatings. For stubborn dust and fingerprints, microfiber cloths are best. Make sure it’s clean, and ideally pick a cloth with deep grooves so that the dust is caught in the cloth rather than being dragged across the display.”