The first thing you want to do is turn off your Mac, then unplug the power cord and any other connected device. You can clean the laptop in three sections: the lid and bottom, the screen, and the keyboard.
To start, lightly dampen a clean, soft, lint-free cloth with water – emphasis on the “lint-free.” If you use a hard or rough cloth – you might end up with scratches on your screen. You can find good deals on Amazon for packs of lint-free cloth that provide value for money, which is more than we can say for Apple’s $20 “polishing” cloth. Make sure to squeeze out excess moisture so the cloth is not dripping – you don’t want to get moisture in the openings. Gently wipe down the lid and the bottom, and you can follow that by swiping with a dry, lint-free cloth to prevent streaks.
It’s pretty much the same process to clean the screen, but you want to be extra careful because Mac screens are even more delicate than the other parts. You can use a dedicated screen cleaner if you’re battling with tough stains and smudges, but Apple warns against using products containing acetone. It also specifies that you don’t use “window cleaners, household cleaners, aerosol sprays, solvents, ammonia, abrasives, or cleaners containing hydrogen peroxide”. You should also be careful not to spray cleaning products directly onto the screen — the moisture might drip inside the display and damage it, or other parts of your Mac.