My Palm pda z22 screen resolution is low after a wet accident! can anybody help to fix it?

Hai I recently got a palm z22 to organize my life. It was really helpful until after a week it got wet in my bag. I didn't know initially it is wet. So I tried to use it the next day it was not working. So I try to charge it. Still it was not on. Then I saw that inside the palm cover is wet. So I used blow dryer on low heat setting. Then I tried to on the power button. I got little success. It was on but the screen resolution is very low. I can barely able to read it. Then I reset it. Still it was in the same condition. I let it dry as it is for a day. Then I opened only the back and blow dry it again. Still it was the same condition. The battery is fused to the back cover. I haven't tried to open the front. Today I am trying to charge it to see whether that will solve the problem. My question is what I can do to get the screen resolution back?