Fixing water damage in phone

I dropped my phone into some water, immediately removed battery and soaked in rice (all I had at work). The phone dried, but the keyboard (G2) had some bad keys that have never corrected, and there seems to be some kind of residue on the screen, and the backlight is not uniform across the whole thing. This all happened 2 months ago, but I would like to fix it. Question is: Do you think I could soak the phone in alcohol, and then dry it in an airtight container with Damp-Rid or silica gel or something similar to help fix the existing problems? Some people seem to think this would cause more damage, I would love to hear the reasoning why though, as alcohol evaps clean...