Maintenance
rinsing your mask in fresh water
Rinse your skin gear in fresh water after every diving day.
Rinsing Your Mask Snorkel and Fins
Your gear will be exposed to salt, sand, and organic matter. It's important to rinse your gear with fresh water to remove these materials. Even if the gear appears to be clean, salt crystals form when the gear dries, and this dries out soft materials such as silicone and rubber.

You should rinse your gear with fresh water at the end of every diving day. And since rinsing does not remove every salt crystal that forms, soak the gear overnight in fresh water before long-term storage.