Xperia V Touchscreen Problem

My friend used his xv and submerged it in the pool for taking pictures. After like a few minutes, it didnt repond to any touch and suddenly it shut down. He opened the back cover to see if there was any leak and took out the battery, but there was none and all ports were closed but the camera lens show there was moist and some water droplets formed. When he try to put back the battery the flash led kept on blinking and the phone won't turn on. He assumed there was a leak so he let the phone dry and when there was no more water droplets in the camera lens, he put the battery and the phone turned on, but now the problem is that the screen wont respond to any touch. :(

If the same case happened to any xv owner or anyone who can suggest a possible solution, please let us know, it will be very much appreciated. Thanx