In reply to Tall Clare:
If it was salt water, it's likely to be a write off - I can't imagine a G9 will be economic to repair.
If you haven't already, remove the battery until all traces of internal moisture are gone.
I had an unfortunate experience with an slr many years ago in a stream. The camera was damaged but the lens only had a drop of water inside, which turned into internal condensation. A camera repairer suggested that I put the lens above a radiator (not mega hot, obviously) to get rid of comndensation inside a lens. This worked fine for my fairly simple (pre - autofocus) lens. So if you leave it out of its case, in a warm dry place, for a few days, you may be OK.
Post edited at 23:05