water damage, touchscreen issues

so i may have dropped my phone down the toilet for maybe 10 seconds

at first it started flickering green but after a night it dried out and the screen worked fine, sound works perfectly, it charges perfectly.

only issue is the touch screen, one second itl work fine, next minute it either freezes and i cant press anything, and i press the power button and turn it back on and itl work for anywhere between 10 seconds to a few minutes or so.

or buttons i havent even touched will be pressed, like if im typing it might press other letters, or searching in google it might zoom in and out etc. also the drop down menu with wifi, mobile date, bluetooth etc. will keep dropping even when im nowhere near it.

will these issues go away overtime or will i need to get a screen repair or something???