You can either use a sodium sulfite solution, or just water. The sodium sulfite just shortens the time you need to soak it, but you have to wear gloves so you might be more likely to scratch them. I've never rewashed them after they've dried though. Just be gentle, and if you use the sodium sulfite rinse really well.
That first one is stunning, btw. Can you see through the lens to focus? Or was that kismet?