Water spots are caused by hard mineral-rich water that is left on your stainless steel sink and then evaporates leaving behind a dirty residue on the surface. These hard water deposits are mostly magnesium and calcium that leave white-colored spots on the stainless steel when water evaporates.
Sprinkle baking soda into the sink:
Sprinkle a generous amount of baking soda over the entire surface of the sink. "Baking soda is a mild and natural abrasive that helps to scrub away stains and residues without scratching the stainless steel," says Alicia Sokolowski, the president and co-CEO of AspenClean.
Mix equal quantities of lemon juice and baking soda to create a paste. Apply the paste to the surface, and scrub with a damp sponge. If there is still rust on the surface, apply more paste and leave it to sit for 15-30 minutes before scrubbing again.
Unsightly water spots form when you air dry stainless steel. Rub cloudy spots with a dampened sponge sprinkled with baking soda. Then rinse the pot clean with water and towel it dry.
The zinc hydroxide corrosion product will dissolve readily in weak acidic solutions. Ordinary household white vinegar has been found very effective and environmentally benign. Commercial products like CLR™, widely advertised for scale and stain removal, can also be effective.
Using Baking Soda
All you have to do is simply mix baking soda and water into a paste and spread it over the sink. Then add in a small amount of vinegar which will cause the paste to fizz. After it fizzes up, clean the paste away. The stainless steel sink will look a lot cleaner once you have done this.
The white buildup you see on your water fixtures is calcite, a deposit left by magnesium and calcium. Water that contains high levels of these two minerals is called hard water. It isn't particularly dangerous to drink, although it will make it difficult to get a good lather from soap.
The white marks on stainless steel sinks, otherwise known as limescale, are calcium deposits left behind by hard water. These can be quickly removed by using a commercial limescale remover, or often with a solution of white vinegar and water (one part vinegar to five parts water) and a microfibre cloth.
Recap: Do's & Don'ts for Daily Use
Clean a stainless steel sink by rinsing it with warm water and applying baking soda to scrub away stains. Use a soft sponge or cloth and scrub in the direction of the grain. For added shine, apply white vinegar, rinse thoroughly, and dry with a microfiber cloth to prevent water spots.
For a sink or vanity, soak a paper towel in vinegar and lay it over the stain. Let the vinegar sit for 30 minutes before rinsing with water. Mix 2 parts baking soda and 1 part water in a bowl or bucket to make a paste. Use a brush to work the paste into the surface.
It is important to avoid using abrasive scouring pads, bleach, ammonia, or vinegar, as these can damage the surface and leave permanent marks or streaks. To give your stainless steel an extra shine and protect it from fingerprints and dirt, consider using a polish or protectant.
Problem: Chalky White Spots
Solution: The unsightly spots on a gleaming pan are typically caused by a buildup of the calcium found in water. Remove them by boiling a solution of 1 part vinegar to 3 parts water. Let it cool completely, then wash and dry the pan as usual.
Mix up a 3:1 solution of water and vinegar (any kind), put the solution in the affected pot or pan (make sure to completely submerge the mineral deposits), and turn heat it up on the stove. Once the water starts to get near boiling, shut off the burner, and let the hot liquid dissolve the mineral buildup.
The white residue you see on fixtures and glassware is the result of minerals carried through your tap water. Higher amounts of mineral deposits usually signify higher levels of water hardness. This nuisance deposit from drinking water is pervasive across the US (see the map below).
Create a cleaning solution by mixing equal parts of white vinegar and water in a spray bottle. Add a few teaspoons of salt and shake well. The salt will help to scrub away the mold, while the acidity of the vinegar will kill the mold and disinfect the area.
In a spray bottle, prepare a solution of equal parts white vinegar and water. Spray the solution directly onto the hard water stains and let it sit for five to 10 minutes. Use a microfiber cloth or sponge to gently scrub the stains. Rinse the area with clean water to remove any remaining vinegar solution.
For stains or light scratches, we suggest use of a mildly aggressive cleaner, such as Shiny Sinks Plus or Flitz. For stubborn stains and more noticeable scratches, we recommend use of a more aggressive cleaner, such as Bar Keepers Friend.
Certain environmental conditions can also make white spots appear on metal surfaces. For instance, high humidity, extreme temperature fluctuations, UV radiation, and chemical air pollutants can all affect the integrity of a metal finish, causing white spots to develop over time.
Removal of oxidized stains and even “surface rust” can be done by using a paste made from baking soda and water or a cleaner that contains oxalic acid, such as Bar Keepers Friend Soft Cleanser. If using baking soda and water, use a cloth or soft bristle brush to rub the baking soda paste in the direction of the grain.
White rust is a white, chalky substance that can form on the surface of zinc materials, like galvanized steel. White rust can form when zinc is exposed to hydrogen and oxygen. This combination creates a zinc hydroxide, as opposed to the iron oxide which is common form of rust.