Why rice does not work
The rice trick is the most persistent myth in phone repair. Rice absorbs some ambient humidity from the air around the phone, but it does nothing about the liquid already sitting on the logic board — and while the phone sits in that bowl, corrosion is eating the contacts. Starch dust also finds its way into the ports and speaker mesh.
What actually saves a water-damaged iPhone is fast disassembly and proper cleaning. Every hour of delay lets corrosion spread further across the board.