Using this Apple keyboard is easy. Just connect it to your computer via the USB port, and you're ready to type. When using, try to keep your hands clean to avoid getting dirt on the keys. For maintenance, you can use a soft, dry cloth to wipe the keyboard regularly. Don't use any harsh chemicals as they may damage the surface. If you notice any keys not working properly, check the connection first. If the problem persists, it might be time to seek professional help. Remember, this is a used keyboard, so some minor cosmetic issues are normal.