Forget what you know about applying sunscreen. With Oasis Sun SPF 30 you should not rub it in until it disappears.
Instead, apply a generous layer to all exposed areas of skin at least 10-15 minutes before going outside and allow it time to adhere to the skin where it will become almost invisible. Reapply every 2 hours.
Oasis Sun is not water resistant and it goes without saying that you should not get it into your eyes because it will sting.