Maybe the last one cause i fullfiled the washer reservoir and some fell out. Probably got trapped somewhere?Any chance you drove thru water and this is residual? Or possibly condensation from running A/C? slso did you happen to wash windshield maybe water ran down? Just Some ideas
I know you said it "looks" like water but are you sure it's not gear oil? I see that you regeard. When I put new gears in I put too much gear oil in. The result is that some gets trapped in the breather hose which is right above that stain on your floor. Over time it will work itself all the way up the hose and out the breather filter and then run back down the outside of the hose and drop on the floor.
That's a big stain though so this may be a long shot but worth a quick look.
And checked more carefully and its not from the breather hose. It is probably from the washer fluid tank.