I used Ceramic Spray recently (followed by Ceramic Boost) and am very pleased with the results on the paint. I also applied Ceramic Spray to the glass. I use a 50/50 mix of isopropyl alcohol and distilled water for window cleaning. Not thinking that I had applied Ceramic Spray to the glass, when I used my glass cleaning formula, it left a streaky mess. I don't think it was a contaminated microfiber towel. So if you are using this mixture (also sold in stores under brand names) have you had this result? I won't be applying Ceramic Spray to glass in the future. I'd rather stick to the glass cleaner because it rarely streaks.