I think you should leave your phone immersed in rice for one week or more if you can.
A friend dumped an entire cup of coffee on his laptop and it went dark on him immediately. He threw it in rice for one week. Took it out. It was dead. He threw it back in and bought a new laptop. Two weeks later tried the old one, it has been working fine since.
a.k.a. the longer the better. But it is your phone, so how long can you wait? Can you borrow an old phone for a short while?