How to Remove Hard Water Deposits

How to Remove Hard Water Deposits. Hard water deposits form when tap water evaporates and leaves behind minerals such as calcium and magnesium.

Step 1

Remove excess dirt, grime or mildew from the area requiring cleaning.

Step 2

Apply an acid cleaner, such as one containing phosphoric acid, to affected areas. Specifically, use a vitreous enamel cleaner on enameled surfaces or a cream cleaner on acrylic surfaces.

Step 3

Consider an alternative: Try wiping the area with liberal amounts of white vinegar. Leave the area for 30 minutes and allow the chemicals to break down the hardened mineral deposits.

Step 4

Rinse the chemically treated area thoroughly.

Step 5

Reapply the cleaner for a longer period of time if deposits are extreme and don't respond to an initial treatment, then scrub with a razor blade or steel wool.