I have a five year old Galaxy S7 and the oleophobic coating has completely worn off. You can find when you try to slide your finger across the screen and experience a lot of friction. I applied water glass to it and after about 30 minutes the first thing I noticed was how much smoother it became. It's not just about screen cleanliness. I cleaned it beforehand. Liquid glass adds a kind of anti-friction coating to the phone, and it looks like it was five years ago. You might not notice it on a new phone with a new coating, but on an old phone with the coating completely worn away, you will definitely notice the difference immediately. are factory coated. Like the touchscreen on my tablet and laptop. These two screens did not have an oleophobic coating. I also put liquid glass on these devices and now their screens look so smooth. My fingers no longer squeak when I swipe the tablet screen, which is great. I was able to cover six phones, a 15 inch laptop screen and a tablet.전체 리뷰보기