Using the Bell Lil Ripper helmet is easy. First, choose the right size for your child's head, which should be between 47 - 54cm. Then, use the fit system to adjust it until it fits snugly. The no - pinch side buckle can be quickly fastened. When your child is riding, make sure the helmet is centered on their head. As for maintenance, you can clean it with a mild soap and water. Just wipe it gently with a soft cloth. Always check the helmet for any signs of damage before each use. If there are cracks or significant wear, it's time to get a new one.