Already done the Rice thing to no avail. Sorry I forgot to put that in My #5.
I wonder if the Medical Vacuum unit that’s hooked up to the bandage on My Foot might get anything else out of it ???
https://en.wikipedia.org/wiki/Negative-pressure_wound_therapy
Thank You.
SM suggested puting the unit, with rice, in a gas oven with pilot lite. Failing the availability of such oven, I would warm the uncooked rice in the microwave (not too hot), put the phone in the rice in a ziplock bag til it cools down, take the phone out, microwave the rice, and repeat a number of times depending on your patience/determination.The point is that rice naturally attracts/absorbs moisture and gives off heat as it does so. Because the moisture which it absorbs changes from the vapor phase to “liquid” as it is absorbed by the rice. And warming up the rice causes the reverse process - the water absorbed by the rice changes from the liquid to gaseous phase. So your warm rice is bone dry, and as it cools it wants to absorb moisture from its environment.
There is a kinda spooky principle involved. Unless you’re using your vacuum device, the atmospheric pressure is always 14.7 psi, give or take. But the partial pressure of the water vapor can be varied. And the phase which the water assumes doesn’t depend on the total (14.7 psi) pressure but only on the partial pressure of the H2O. Your grandson “varied” the partial pressure of water in a very undesirable way, and you are reversing that process when you do the things being suggested. Only question being whether the effect of the water on the phone is reversible. Hope so.
Your negative pressure medical device might just be the right thing to use. Dropping the air pressure will help remove the water vapor inside.
What kind of water did you grandson drop the iPhone into? I hope it was clean water. Water that was ionized is harder to clean out.