Hard Water Spots, Calcium Deposits, and Lime Scale are just a few names for the white, crusty substances that forms, better yet, gets etched into your glass. Usually hard water spots are caused by city water, saturated with minerals such as calcium, magnesium or other compounds, drying upon your glass. This process occurring over and over, like from a sprinkler system or shower head, damages the glass surface of the window or shower door. There are different levels or stages of damage caused by hard water spotting. The majority of damage can be cleaned up with a little patience, the correct product, a 3M white scrub pad, possibly a scrapper and some arm strength.
Before spending any time, money or energy on creating a clear view through your glass; try to solve the cause of the problem. In most cases, this can be accomplished simply by redirecting your sprinklers or eliminating the water source in which makes contact with the affected glass. If redirecting or eliminating the water source is impossible, a sealant like Rain-X can be applied to the glass after the hard water spots are removed. This will not solve the problem, but it will prolong it. Moreover, water softening tanks can always be installed to help avoid the hard water spot problem.
Supposedly, there are many tricks and household remedies which can remove hard water spots. Such remedies would be by using toothpaste, various types of dishwasher detergent type products, CLR, Lime-Away, oven cleaner, metal polish, a vinegar/water mixture, Windex and so on. Good luck with those and be careful with products containing acid with a high level of concentration. We at ACV recommend going to your local janitorial supply company for some free advice and purchasing a product which is specifically made for hard water spot removal. There are many products out there that work great and are relatively cheap. Don’t forget the 3M white scrub pads while you are there.
If you still cannot remove the hard water spots, then you have the worst level of damage. Acid washing or glass buffing can usually solve the problem, but it is highly recommended to be left for the professionals to avoid possible chemical burns or causing more damage.