GoPro touchscreen not working after being in the water

After swimming with my GoPro it turned off I assumed the battery had died. While charging it I notice foggy spots on the inside of the camera cover and front display. I dried it out and let it sit in the sun. The foogy spots went away and the camera still works but the rear screen is black it’s some light coming from the corners but the touch screen still works . Not sure what to do or where to start. Not sure weather to put it in rice or buy a replacement rear lcd.

Thanks any help is appreciated