Phone Randomly Restarts and ghost types at times

A couple of months back I dropped my phone while it was running in the toilet. Stupid mistake I know. I got it out, removed the battery,sim and memory card and let it dry for a couple of days. Eventually I was able to use it again. After that it has never been the same again.

The phone randomly restarts and I have to power it on 2-3x to get it to stay on. When working out and i get a little bit of sweat on the screen the phone starts ghost type and doesn't type the right characters when i type. I usually have to dry off the sweat and just wait. Is there any way I can improve the performance of the phone in any way or is the internals just permanently damaged from water