Using this Mirage mask and snorkel set is easy. First, adjust the straps on the mask to fit your face snugly but not too tight. Make sure the silicone skirt seals well around your face to prevent water from leaking in. Put the snorkel in your mouth with the mouthpiece between your teeth and lips. When you're in the water, if water gets into the snorkel, just blow out gently through the purge valve to clear it. As for maintenance, after each use, rinse the mask and snorkel with fresh water to remove salt, sand, and any other debris. Store them in a cool, dry place away from direct sunlight to prevent the silicone from deteriorating. Be careful not to scratch the mask lens. And always check the mask skirt and snorkel mouthpiece for any signs of wear or damage before each use.