Are there any alternatives out there I could substitute for windshield wiper fluid? Some magical ratio of simple green and water? What I'm looking for is something I can possibly make at home, something that can take off nasty bug residue but doesn't harm the paint, and it mustn't streak. I have this blue stuff in my car and I have no idea what it is - it was in there when I got it - and it sucks. It always leaves streaks on the windshield.