Here's a tip for the future...If your battery powered item takes a swim in salt water, that's the worst case scenario. If in fresh water, not so bad.
However, you have to evaluate how much water you think hit the item, and decide your course of action. Saltwater corrosion is a problem that will worsen as it dries out. So, I would consider exchanging the saltwater with distilled water. Not "bottled water", plain old DISTILLED WATER. Distilled water is non-conductive (mineral free), so you immediately get rid of the primary issue. You of course are the decision maker during this process. I would dunk the item in a plastic bowl filled with distilled water, swish it around, (heck, it's already been wet!) shake off/out the excess water and set it on a paper towel. After an hour, turn it over/around and let the water slowly come out. Repeat that turning motion until the water stops seeping out. It might take a little longer than most of us want to wait, but you might be surprised with the results. Lake/freshwater contains minerals too, and I'd do the same wash job on an item that went skinny dipping.
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