Driven Extreme Duty Glass Cleaner, 16 oz Bottle Driven Extreme Duty Glass Cleaner was designed to remove the very toughest, etched in, hard water build up and stains from any glass surface By combining an acid gel, with our Extreme Cutting Abrasives and a full spectrum of industrial strength cleaners, Driven Extreme Duty Glass Cleaner has the power to clean the most severely weathered glass surface Safely Removes:Severe Hard Water Spots, Calcium and Mineral Buildup, Heavy Lime Scale, Salt Spray Deposit, Rust Deposit, Alkali, Mold & Mildew, Paint Over-spray