I have on hand the highest alcohol concentration I can find locally, which is 91 percent, I just noticed you can find on Amazon 99% alcohol, which would be much better for purposes of drying and removing impurities.
I've done the rice trick with a mini quad that submerged in a river, I suggest placing everything in a pillow case then the rice, if you decide to go this route, to keep the rice from getting into tight crevices. I left my mini and camera in the rice for three days, and it everything worked afterwords, to this day no problems.