I have a soda bottle half full of a fluorescent green fluid. I didn't label it and have no idea what it might be, except it almost certainly is automotive?
It seems pretty watery, but I have a half empty bottle of antifreeze, so it probably isn't that. I also found brake fluid and PS fluid, so those aren't likely.
I don't find any windshield wiper fluid; could that be bright green? How could I tell? Mix some with water and see if they separate?
Getting old is a b......