How to Remove Hard Water Stains from Glass？

I tried getting rid of hard water stains on my shower door, but it was not an easy task. I did a bit of research and came up with several methods on how to remove hard water stains from a glass. Hard water stains commonly form on the glass after the water containing high levels of magnesium or calcium evaporate on the surface. When these mineral dissolves, they leave cloudy or white spots that are hard to remove using standard cleaning detergents.