My so left it on the kitchen dresser. When I picked it up (because it was bootlooping) the water came dripping out. I think most of it was in the seams between the cover, but there were some substantial drops in it, but only on the plastic parts.I placed it immediately in rice to dry with the back removed. It still booted afterwards, and everything seemed to be functional (wifi, rotation, camera etc.). Only charging doesn't work. Ran battery endurance test to heat it up a little extra, but charging still doesn't work.I see some corrosion a little above and to the left of the battery. Other than that I cant spot anything unusual. How do I check which part is the problem?