Iphone screen not working. Has been water damaged?

I dropped my iphone in the the toilet about a week ago. When i pulled it out it was still on. The screen flickered for a moment and turned off. So i dryed it off and put it in a cup of rice. The next morning i tried to see if it was working and tried to turn it on. To no surprise it was not working. I thought maybe it needed to be charged since before this happened it was less then 10%.So after a little bit of charging i heard the text message tone but the screen was still not working so i turned it off and put it back in rice. One week later the screen is still not working and i was wondering if anyone knew what could maybe fix the problem that i'm having. The sound works it still charges it connects with itunes i can still touch the screen to turn it off and unlock it. The only thing that seems to not be working is that i can't see my screen at all.

You most likely have interior damage. (Dun Dun Dun) The way proceed with this is to buy a new phone

It possible that your LCD display is damaged.need to replace a lcd and here is some info you can have a look