I just got my new S4. Huge upgrade from my old S0. I'm wondering about swimming. I see that if I do a swimming workout, I can do the "unlock" step at the end which I understand helps eject water. But if I just go into the pool and I'm not working out, I don't see how to do this eject business. Am I putting the watch at risk by going into the pool and not starting an official workout? Thanks!