If you have access to a Vacuum oven you might try that at a really low heat, note the term VACUUM OVEN, don't toss it in your kitchen oven or microwave. Also do not apply power until you are absolutely sure that there is no moisture inside. If it was bottled water you may be alright as that has less suspended salts than tap or sea water, but unless it is distiled water there is always something in water that will leave residue. I have rescued Cell Phones, Digital Cameras, PDA's, watches and a few other electronic goodies with the vacuum oven, the big trick is not having power applied when water is added and washing with the cleanest water you can get your hands on before drying. You probably got your lens wet with the cleanest water possible. Good luck and let us know how it turned out.