Sorry but putting any device in rice solves nothing. All it does is causes some but not all of the liquid that is currently still inside of the phone in liquid form to evaporate. Some will still be there and the damage would still be there as there will be corrosion, green marks on shorted areas of the board.
What you need to do is disassemble the device to the board and clean the ribbon connectors on the logic board with at least 99% isopropyl alcohol and any other affected areas that you see water damage or green marks. There are even some areas that can be liquid damaged and not be visible by the human eye, which could require a microscope to see it.
Best to wait for what others say about this because I'm sure they have better suggestions, recommendations.