How can I prevent my child's goggles from fogging?

Start with dual-lens goggles that have anti-fog coating—this is the foundation. Teach your child never to touch or wipe the inner lens, as this destroys the coating. Ensure the goggle fits properly with no gaps that allow moisture in. Never let them put goggles on a sweaty forehead or hat—this transfers moisture directly to the foam and lens. Make sure helmet and goggle integration doesn't block the ventilation ports. Air dry completely after each use. If fogging is chronic despite these measures, consider upgrading to a model with enhanced passive ventilation or a premium anti-fog coating.