Unger Professional Streak-Free EasyGlide Glass Cleaner Concentrate, 32 oz – Ammonia-Free, Makes 25 Gallons of Solution , Safe for Tinted Windows, LOW-E Glass, Windshields & Mirrors

Customers find this glass cleaner effective, noting it works well with squeegees and leaves windows crystal clear. The product is easy to use, with one customer mentioning it's easier than using a power washer, and they appreciate that only two capfuls are needed per gallon. They like its concentrated formula, pleasant scent, and durability, with one noting it will last a year or more.