Using your Giro Fixture MIPS helmet is easy. Just put it on your head and adjust the Roc Loc Sport fit system until it's comfortable. Make sure it sits level on your head and doesn't tilt forward or backward. When riding, always fasten the chin strap securely. As for maintenance, use a mild soap and water to clean the helmet regularly. Don't use harsh chemicals as they can damage the helmet's materials. After cleaning, let it air - dry. Check the helmet regularly for any signs of damage like cracks or dents. If you notice any, it's time to replace the helmet for your safety.