Wet phone, keypad works to turn phone on nothing...

Question

my phone fell on the beach and may have caught a wave. It was slightly damp on the exterior. I removed the battery and opened it as soon as possible. I let it dry out in the hot sun.I can turn the phone on using the key pad but once the phone is activated the keypad is no longer working - which makes me think something is wrong with the electronics?. THe phone recieves calls, rings and announces new messages. But I can't answer or dial as the buttons don't respond. I can only turn the phone off by removing the battery. The onscreen animation seems to be runing quicker than usual as well.Thanks in advance