Thanks for sharing the screen shot of your Samsung Galaxy device warning not to use for charging/USB port.
Also, we appreciate that you've posted feedback here, that its all okay now.
In addition,the message "moisture detected" is actually a safety precaution to safeguard your Samsung Galaxy phone, not an error. When it detects moisture in the USB cable or charging port, the moisture detection sensor intelligently stops the charging of the device.
Should you need more assistance and guidance, you may contact us on our online Samsung Customer Care support channels below.
