Iphone 5c water damaged but heats up when charging?

A few days ago I dropped my phone in the toilet. I immediately fished it out, lines flashed on the screen and then it turned itself off. I did not then try to charge or blow dry it. I immediately put it and a bag of rice and silica gel. I checked it 28 hours after by charging it and trying to turn it on. It heated up, but no luck. I then have now left it for 48 more hours, so a total of more than 3 days in the silica and rice and tried again. I left it charging for a long time but nothing. The phone is warm but not turning on, what does this mean, and is it a fixable problem? To the naked eye my liquid damage indicator definitely looks white, however when I shone a flashlight down the hole where it's located it ended up looking a bit red, but I don't know whether it is because of reflections or what. I've seen other people who have left their phone in water for a lot longer than mine, and then done the wrong things like hair dry it or try to charge it, and it still works. So why is mine not working?!

It is dead.
Time to get a new phone.