To clean your MacBook screen use a micro fiber cloth and some water. Before you use water on your rag use the dry micro fiber cloth to wipe down the screen and get rid of all the dust. Once you have wiped the dust off of the screen take the micro fiber cloth and dip it in some water. Make sure that the cloth is not soaking wet all you want to do is put a fine layer of water on the screen as you wipe it down. Once you have wiped it with the damp cloth take a dry cloth or the dry part of your micro fiber cloth and wipe it dry. Once you are done the screen will be shiny and clean. You can also use the micro fiber cloth to clean the rest of your computer as well. So keep it clean and shiny and ready to use.