My iPod has water damage, it works but screen is black

I dropped my ipod in the toilet, took it out straight away, dried it and carried on using it. I didn't know that your meant to power it off to not cause any permanent damage after a few minutes the screen started flickering and the brightness randomly changed. I left it to charge for the night, I woke up the next morning and the screen didn't work. However, I could still use it as the touch still worked and the ipod seemed to be working fine. I could play music and turn on games but I had to guess what I was pressing. I'm not sure if this is any easy fix? Maybe I just have to replace the LCD and digitizer? Please help.