My Moto X2 fell in a washing machine once. I waked the phone afterward to make sure it turned on. Then I turned it off all the way and placed it in a bag of rice. A few days later, I took it out and it seemed to work OK. I am using it now. I have only found a few things that could be a result of the incident. The first being that it disconnects from working WiFi networks occasionally (even though most of the time it’s still discoverable). Seccondly, people have a hard time hearing me sometimes. That being said, my phone is not waterproof, merely repellent. The G3, as @c1tobor said, is certified to be waterproof up to certain time and depth limits. It should be fine. If you are really worried, you could power it down for a day or so.