Re: Ok Google / microphone
It's pretty much the same thing. It has to do with your microphone's sensitivity and the background noise. Have you tried using it with a wired headset?
Re: Galaxy s6 has condensation inside camera
There's probably still some water trapped inside of it. I would say, leave it for a day in an airtight container filled with rice. Throw some silica bags you have laying around in as well.