Accidentally dropped your iPhone 7/ 7 Plus into water or spilled a drink on it? The first thing you need to do if possible is switch it off and leave it off and DO NOT charge your phone as this will cause further damage.
The next thing you should do is get it to us so we can perform iPhone water damage repair. Our technicians can repair 90% of water damaged iPhones. It is important to note that water/liquid damage repairs do not cover the cost of a new screen if a new screen is required.