This is a common problem in the St. Geroge area. We use specialty products and techniques in order to remove this staining without damaging any special finishes or delicate surfaces. The biggest culprit of hard water on your windows is your sprinklers. Every time tap/well water is left to dry on your windows they leave behind mineral deposits. Over time these minerals leave a  white haze/stain and if left unattended can be permanently etched into the glass! So let us get rid of those nasty stains before they become a problem!