Using the Bell Crest Junior Youth Cycling Bike Helmet is a breeze. First, adjust the helmet to fit your head using the one - handed Ergo Fit system until it's snug but not too tight. You can put on the removable visor if it's sunny or rainy. When riding, always make sure the helmet sits level on your head. As for maintenance, use a mild soap and water to clean the helmet. Avoid using harsh chemicals as they can damage the polycarbonate shell. Store the helmet in a cool, dry place away from direct sunlight. Check the helmet regularly for any signs of damage. If it's been in an accident, replace it immediately for your safety.