Using the Trek Solstice Mips helmet is straightforward. First, adjust the fit system to ensure a snug and comfortable fit on your head. Make sure it sits level and doesn't tilt forward or backward. When riding, always fasten the chin strap securely. As for maintenance, clean the helmet regularly with a mild soap and water solution. Avoid using harsh chemicals as they can damage the helmet's materials. Store it in a cool, dry place away from direct sunlight. Check the helmet for any signs of damage, like cracks or dents, before each use. If you're involved in an accident, replace the helmet immediately, even if there are no visible signs of damage, to ensure your safety.