Few years back, after dad died, I got his old truck. He was a firm believer in rain-x and used it for years on all his vehicles. I guess he never drove at night because the windshield was so coated it had a kind of oil sheen that really only showed up at night. any oncoming lights or traffic signals looked like they were going through a prizm. driving at night made all incoming light seem like you were looking through a kaliedescope, everything was refraced in multiple colors and ongoing patterns, and I couldnt find anything to clean it off. After that, I became very leery of what I put on a windshield. I have since experienced this rain-x kaliedescope effect on several vehicles. It is not just me, others have seen it too in other vehicles. I'll say something and they say I thought it was just me, all the oncoming lights were like a rainbow effect
