Water Damaged Note 3

It happened a few months ago.

I woke up seeing my phone is still charging. I grabbed it and noticed it was unexpectedly hot. It was wet so i wipe it with cloth. But i also noticed there was already water on the inside so i immediately remove the battery, sim card and sd card. I put it in the rice for a few hours and got impatient and tried to charge it and a few minutes, it still shows no sign of life and i put it back in the rice once again and leave it for a day.

I woke up and immediately go to my phone and charge it for a few hours… still no signs of life. But i feel my phone warm as it charges so i thought my phone was still alive. I searched everything on how to fix it and i saw some videos about cleaning it with alcohol. I disassemble my phone carefully and got a toothbrush and an ipa 70 percent. Still doesnt work but they said use pure ipa 99 so i buyed one and disassemble it once more and cleaned it with ipa 99 and dryed it for today. But still it does not work. Im on an edge of giving up and my last plan is to dunk the motherboard and other parts or submerge the phone in ipa 99 please help me. Last note: it happened a few months ago and i tried using ipa 99 this week and still does not work

The motherboard looks clean, i noticed some salt thingy and i think thats a corrosion and cleaned it with 99 ipa. Charging port also have corrosion and cleaned it and the phone still not work