My phone got some splash water. Unfortunately some water drops landed in the usb charging port. The phone gave me the error message that it detected moisture and i should dry it.
At some point the phone died because of low battery. I did not have charged it yet because of the concernings that the water and charging could damage the phone.
UPDATE: i used paper towels and let it dry overnight. I charged and there was no warnings.
My phone tells me there’s water in the port after I plug it in sometimes.
There’s no danger if the phone has hardware to detect the water ingress and software to notify you. My phone when dead has given me this message, and I hit it was canned air like to clean your keyboard. Sometimes, it takes a few tries before the message goes away.
You should be fine to plug it in if you’ve done your best to dry it. They assume far less careful people than you will be using them.