One of the brands of hydrophobic car wax at can tire is great too. I put it on the glass after washing, razoring, and claying it. It lasted so damn long and I didn’t even use the wipers until snow started. I also fully cleaned off all the mold or mildew gunk off the house windows and applied the same wax almost ten years ago and it has stayed crystal clear to this day. The first time I cleaned it, it went back to how it was after a year or so.