Xperia Z3 :: Phone Touchscreen Stopped Working

I rinsed my phone under the tap today because someone got chocolate icing on the screen. I didn't submerse it in water and i haven't dropped it. I simply ran it under the tap for no more than 5 seconds then dried it on my shirt and now the touchscreen doesnt work.
 
I made sure the flaps were closed and i've checked the indicators, on both sides they are yellow/white and not pink.
 
I'm trying a repair through the computer as restarting the phone has done nothing.