Question [Q] Touch Screen Bugging Out NEED HELP

Hello Community,

My Uncle dropped his phone yesterday into a small puddle, Initially the screen would power on and work perfectly except the screen would not respond to any touches, after leaving it in rice over night and all day the screen is now responding to touch(I have even done tests drawing perfect lines and swype keyboard works perfect) But every couple of minutes the phone starts opening radom apps and the touchscreen starts freaking out(I enabled the Show touches option in the developer menu and you can see the touches flying all across the screen)

Please let me know if anybody has seen this before or this a problem with the digitizer from the Fall VS Water damage Thanks