I’ve used paper towels with isopropyl alcohol to get rid of scuffs and such on the outer casing, but a moist paper towel will clean your computer quite nicely unless you’ve put off cleaning it for a few weeks (like I inevitably do).
@queenzboulevard The laptops with a glass front can be cleaned with normal glass cleaner, I suppose. For laptops with traditional LCD screens, the Apple User Manual says on page 107 to only use water on a clean cloth to clean your screen.