Using the Bell Lil Ripper Kids Helmet is a breeze. First, choose the right size for your child's head. Then, put the helmet on your child's head and use the no - pinch side buckle to adjust it until it fits comfortably. Make sure it sits level on the head and doesn't tilt forward or backward. When your child is cycling, always ensure the helmet is properly fastened. As for maintenance, use a mild soap and water to clean the helmet. Don't use harsh chemicals as they may damage the helmet. Store it in a cool, dry place when not in use. Check the helmet regularly for any signs of damage like cracks or loose parts. If you notice any issues, it's time to replace the helmet.