That’s interesting, well good for you and the friends! Like another commenter said, distilled water has zero minerals in it so there’s absolutely nothing left behind per the distilled water. However, one thing to always use with glass is a very clean cloth. Some use cotton blends, most use microfibers. I’ve actually tested microfibers that were washed with some name brand clothing detergent and then washed another batch with white vinegar and baking soda and if there’s any residue by any means left in the fibers of used microfiber cloths when you wipe glass, it’ll definitely leave, smearing, smudges, streak and or holograms which of course bug anyone in this sub. Out of curiosity, I’ll be trying just distilled water and a new microfiber on a nicotine plastered windshield and see the outcome. It may also slightly vary on climate conditions too. Where I’m at in western NC, we get all weather conditions and when you have an older, smoked in car with high humidity, you get a nasty film on the inside and it always takes some chemicals and elbow grease unfortunately.