Kind of unrelated, I had a flashlight flood a few months ago while in the ocean. It was out and rinsed in fresh water with in 20 minutes - yet looked like it had been under for a hundred years. The light was a total loss but I did save the battery of all things.
Now apply that to your free (or $199) iPhone. Replacement cost is full value which is over a grand if it’s locked in the two year contract. Too much at stake for me to try.