Still works ?? that’s amazing

It needs to be opened, and cleaned … unplug everything, even the battery

If you’re broke, watch a lot of water damage repair video’s on YT… ( from you’re phone :) … so you get an idea of what water damage looks like

then watch a tear down of your model, ground yourself (to avoid static electricity damage) and clean everything up with Qtip and alcohol

watch out for liquid that may have gotten under chips, which will dry out very very slowly and be very easy to not see

Don’t solder yourself unless you have an experienced mate to help you out… a lot of those PCB’s are thick and absorb heat, making soldering very difficult without experience

But from the looks of it, you’re not gonna need to solder on new connections