Do I need a screen replacement?

So, long story short, my iPhone fell in the toilet. Now, 5 months later, its starting to work…
When I press the home button or on/off button, the screen turns blue and if I press the off button again, it goes back to black. Next, the other day, it was sitting in the iHome dock when I realized that I received a text message. The headphone jack still works because if I plug in the Apple headphones and press play, the music plays. Vibration still works, it charges and everything. Do you think I just need a screen replacement?

A screen replacement generally refers to replacing the sheet of glass from the display. That won't help you. The components that are causing this cost more to purchase and install then a new phone would.