Dropped my HTC One in sea
Hi, I dropped my HTC One into the ocean. The phone was switched off already when it made contact with water. I tried to see if it's working after I kept it for a day by charging it for not more than 5 secs, but didn't see the red light. I haven't turned it on or tried to charge it after that. After 3 days (Am I too late?), I opened up the phone using some tear down tutorial and I was wondering if it is okay to wash the phone, dry it and then try to charge it? Also, there is a copper plating on the back of the motherboard which has black marks. I wonder, if they are due to the corrosion from sea water or because of extensive use for the last couple of years. Please help. It's urgent.