Welcome to the forums, sorry for your woes.
Keep it off, water only hurts when there's power. Definitely keep it off the charger.
Have you tried putting it in a desiccant? Many of us have used dry rice for that.
Wrap loosely in a baggie, just to keep the rice from working its way in, place in a plastic container surrounded with rice, put lid on, but allow it to breathe, and sit in a warm place. I've used a windowsill and sunlight for this.
If that doesn't work, check back, we can discuss an alcohol bath.