Using this Giro Fixture MIPS helmet is easy. First, adjust the Roc Loc Sport fit system to get a snug and comfortable fit on your head. Make sure it's not too tight or too loose. When riding, always fasten the chin strap securely. As for maintenance, you can clean the helmet with a mild soap and water solution. Gently wipe the exterior and interior parts. Don't use harsh chemicals as they may damage the helmet. After cleaning, let it air - dry. Also, 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 for your safety.