First of all, put the phone in a ventilated place and let it stand for about half an hour. Under normal circumstances (water is not serious), it can be solved through this situation. Of course, you can also use a fan or a hair dryer (use the normal temperature setting of the hair dryer) and other tools to dehumidify the tail of the hand.
The other is to go directly to the repair shop, let the maintenance master repair, change the tail plug or tail plug small board