Screen and keyboard cleaning are important parts of computer maintenance to maintain their performance and prevent the spread of germs. To clean a computer screen, use a microfiber cloth dampened with a small amount of water or a screen cleaning solution. Avoid using paper towels or rough materials that can scratch the screen. For a keyboard, use compressed air to remove debris between the keys, then wipe down the keys and surfaces with a microfiber cloth dampened with a small amount of rubbing alcohol or a keyboard cleaning solution. Be sure to disconnect the keyboard from the computer before cleaning. Regular screen and keyboard cleaning can prevent the buildup of grime and bacteria, improving their lifespan and functionality.