g12 water damage

Before doing anything, I would wait for it to totally dry, give it a week or so, and see if it really affects the performance. Small flaws on the outermost lens element are usually very hard to see in photos. I have had wet electronics that seem totally dead for several days, and then a week or more later spring back to life.

If you have waited long enough, and the water spots do ruin your photos, sending it for service would be the safest bet.

If the camera is unusable, and you don't want to send it in, AND YOU ARE WILLING TO TRY SOMETHING RISKY I JUST CAME UP WITH OFF THE TOP OF MY HEAD AND UNDERSTAND YOU MAY BREAK YOUR CAMERA, maybe try steam cleaning? I know it sounds counterintuitive, but some appliances like ovens with glass doors have a steam clean function that the manufacturer recommends in order to clean between the layers of glass in the door.

http://support-us.samsung.com/cyber/popup/iframe/pop_troubleshooting_fr.jsp?modelname=NE59J3420SB/AA&homeid=29289&from_osc=&idx=638093&modelcode=NE59J3420SB/AA&

If it were going to try it, I would first power it on so the lens is extended, take out the battery so the camera is off with lens extended. Hold the power button down for 30 seconds to drain any remaining juice. Then, take it into the bathroom and run a hot shower until all the glass in the room is nice and steamy. Do not get the camera directly near any water, but wait till the lens is sufficiently foggy. Then, give it a once over with a hair dryer (not with the heat too high, there are plastic parts, lubricants, etc. that may be susceptible to heat). Once it looks mostly dried off, put the camera in a container with some desiccant packs (or as a fallback, on top of a container full of rice) for at least a few days but preferably a week before you put the battery back in and fire it up.

Again, I would only do this if the camera is unusable in its current state, AND you can't/won't send it in for a proper repair.