A drip

I spy with my little eye, a drip or seepage, or something.
A dot of moisture caught my eye, so now I'm checking the ball valve join each time I use it. Which is several times a day. Not sure if its condensation in the cold or genuine seep.
Last year I noticed water in the bilge and it turned out to be a sweaty hull...
Still, I cant help feeling I may have to tighten it up. Out of the water.

Here's lookin' at you Mr. B. Valve.