What can I do to save my iPhone XS from drowning?

Question

iPhone

Yes, it must be waterproof. But this is nonsense - I checked. It is enough just to blow into the SIM card tray to feel how the air comes out of the gap between the screen and the case.
How did I know? After light water procedures at the level of "splashed lightly with a wave and then rinsed under the tap," the phone began to warm up to high temperatures. Then it turned on, then turned off again. Basking. Doesn't heat up anymore. Dead brick.
I opened the SIM card to check the drowned person indicator - I don’t see anything red there.
The question is - can I still count on salvation or is the phone definitely over? While I put it in a bag with rice ..
It does not react to charging.