Using these Izipizi baby sunglasses is easy. Just put them on your baby's face, adjusting the position to make sure they cover the eyes properly. The straight arms can be gently bent to fit your baby's head. If you want a more secure fit, attach the removable silicon strip around your baby's head. When it comes to cleaning, use a soft, damp cloth to wipe the lenses and frames. Avoid using harsh chemicals as they may damage the sunglasses. Always store the sunglasses in a case when not in use to prevent scratches. Keep in mind to check the fit regularly as your baby grows, and don't leave your baby unattended while wearing the sunglasses.