Using this helmet is a breeze. First, adjust the head basket according to your child's head size. It can expand as your child grows. Then, use the self - adjusting KidFit system to get a secure and comfortable fit. Make sure the side buckle is fastened properly on your child's cheek to avoid any pinches. If you want to increase visibility, attach the Universal Lazer LED at the rear of the helmet. When it comes to maintenance, you can gently wipe the helmet with a damp cloth to keep it clean. Avoid using harsh chemicals as they might damage the helmet. Check the helmet regularly for any signs of wear and tear, like cracks or loose parts. If you notice any issues, it's time to replace the helmet. And always keep the helmet in a cool, dry place when not in use.