Editor's Note: this works because rice acts as a (weak) desiccant, which pulls moisture out of the air, which means it will slowly pull
the moisture out of the phone.
If you want a stronger solution that will pull
the moisture out of the phone more quickly (and be way more reliable), look into getting an iFixit Thirsty Bag.
Not exact matches
The whole reason a
phone fries when it hits an excess patch
of moisture is because the battery is sending power through the circuits, which then short
out when the connections are bridged by the conductor
of H2O.