Using this Bell Sidetrack helmet is easy. Just put it on your child's head and adjust the Ergo Fit system until it fits snugly. Make sure the helmet sits level on the head and covers the top of the forehead. When your child is riding, always remind them to keep the helmet on at all times. As for maintenance, use a mild soap and water to clean the helmet. Don't use harsh chemicals as they can damage the helmet. After cleaning, let it air - dry completely. Check the helmet regularly for any signs of damage like cracks or loose parts. If you notice any, it's time to replace the helmet to keep your child safe.