It’s a tedious task you've been putting off for what could be years. But the moment has come: You're going to clean your computer inside and out. That means scrubbing down those keys and wiping the fossilized fingerprints off your screen. It also means deleting all the files you secretly downloaded when you were trying to figure out how to make a GIF, and finally tidying up your feeds on social media. You Will Need Before doing anything, you need to turn off your device. Unplug it as well.