mobile

I dropped my phone face down on a partially wet floor, like a shower room floor. The drop was not that high and i picked it up and wiped it as soon as possible, now some parts of the screen don't respond. And recently, the screen was detecting different touches, as my pattern passcode was going crazy. What might be causing this problem? The drop or the maybe water getting into the phone? Would a screen replacement fix this? Thanks =( please help