@christinee Hello, it is very likely that there are still traces of moisture in the USB port. Apply heat / not excessive / with a hair dryer in the USB port area.
It could also be a notification that has been left active. Try resetting the USB port settings to dismiss or confirm it.
Access Settings/Applications and click on the area marked on the screenshot.Activate "Show system applications" and accept.Search for the USB Settings app and in storage-clear cache and Data and restart the device.
Comment if you have been able to solve it, greetings.