Use professional stain removers for tough stains or corrosion on glass. Choose from top brands such as Unger, Presto, Ettore, Pulex and Titan. Many products are aggressive enough to even remove hard water stains. If you are looking to learn more about removing heard water stains, check out our Stain Removal Guide. Unger Rub Out, Ettore Scrub Off and Pulex Rub Off are just a few examples. Choose between liquid polish, hard water mineral powders and more! Window cleaning abrasives such as bronze wool, steel wool, and other scrub pads are also available.