How do I keep faucets and showerheads free of mineral buildup?
Wipe fixtures dry after use, clean water spots with a half-and-half mix of white vinegar and water for a short time, then rinse and dry. If the showerhead's maker allows it, soak a scaled head in a bag of diluted vinegar, and clean faucet aerators whenever the stream weakens. If scale keeps coming back fast, have your water tested for hardness and consider treatment.
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By Kasra Taheri, Founder, LoclisPublished
Researched and drafted with AI, then checked claim by claim against the sources listed below before it was published. Prices and rules change; the dates beside each source say when it was last checked.
Step by step
Read when to stop and call a pro, further down this page, before you start.
Step 1: Wipe fixtures dry
After showers and heavy sink use, wipe the faucet and showerhead with a soft cloth so mineral-laden water does not dry on the finish.
Step 2: Clean spots gently
For dried water spots, use a 50/50 blend of household vinegar and water for a limited time, then rinse with water and dry with a soft cloth.[2]
Step 3: Skip harsh products
Avoid harsh cleansers such as lime scale removers and green fibrous scrub pads, which can scratch or damage the finish.[2]
Step 4: Soak a scaled showerhead
If the maker's care guide allows a soak, as Moen's does for its Nebia heads, tie a bag of half distilled white vinegar and half water around the head for 30 minutes to an hour, then run the water.[4]
Step 5: Rub the nozzles
On a showerhead with soft rubber nozzles, rub each one with a fingertip while the water runs to push out loosened scale.
Step 6: Clean the aerators
When a faucet stream weakens or sprays sideways, unscrew the aerator, rinse out debris and deposits, and put it back.[3]
Step 7: Find the main shutoff
Before you turn old valves, find the home's main water shutoff, usually found around where the water meter is located: a basement, outside wall, garage, crawl space or close to the street.[6]
Step 8: Exercise the shutoffs
Once a year, gently turn each shutoff valve under the sinks and behind the toilets closed and open a few times to keep deposits from building up inside.[7] If one leaks or will not reopen, close the main and call a plumber.
Step 9: Test your water
If scale returns quickly, have a certified laboratory test your water for hardness and compare the result with Virginia Cooperative Extension's hardness table.[1]
The easiest way to keep faucets and showerheads clear of scale is to stop hard water from drying on them, and to deal with the deposits that do form before they harden. A quick wipe after use, an occasional diluted vinegar clean, a soak for a scaled showerhead and a rinse of each aerator cover most homes. If scale comes back within weeks, the water itself is the thing to look at.
Why the buildup forms
Virginia Cooperative Extension explains: "Hard water contains high levels of calcium and magnesium ions."[1] Those minerals come from rock the groundwater passes through. Extension adds: "While consuming hard water does not present a health risk, it may cause aesthetic or nuisance problems such as bitter taste or mineral deposits (scale) on dishes, utensils, and plumbing fixtures."[1]
Each time water evaporates on a fixture, it leaves its minerals behind, which is why the white crust shows up first on spray nozzles, aerator screens and the base of a faucet. The same process happens out of sight: "In pipes, excessive mineral scaling can reduce water flow and pressure."[1]
Cleaning the finish without damaging it
Choose the cleaner with care, because the wrong one can scratch a finish. For Moen finishes, routine cleaning is a damp cloth and mild liquid dishwashing soap, and for dried water spots on most of its finishes Moen says: "A 50/50 blend of household vinegar and water can also be used for a limited amount of time, followed by rinsing with water and drying with a soft cloth."[2]
What to avoid matters as much. Moen warns against harsh cleansers, giving lime scale removers as an example, and against pads or sponges unsafe for polished metal.[2] Its reason: "Most green, fibrous pads/sponges contain microscopic mineral particles that can scratch a faucet's finish."[2] For powder-coated finishes such as matte black and oil-rubbed bronze, Moen also rules out abrasive sponges and steel wool, and for its Spot Resist finishes it adds ammonia and bleach to the list.[2] It notes: "Failure to comply with these cleaning instructions may void Moen's warranty."[2] Other brands publish their own care guides; read yours before trying a new cleaner.
Showerheads
A showerhead clogs from the inside out: scale narrows the nozzles until the spray turns uneven and jets shoot sideways. For its Nebia showerheads, Moen recommends a solution of 50% distilled white vinegar and water in a bag tied around the head for 30 minutes to an hour to dissolve typical buildup.[4] That soak is Moen's advice for Nebia heads. On most of Moen's faucet finishes, a 50/50 vinegar mix is allowed only for a limited amount of time,[2] so for any other showerhead, read its maker's care instructions before you soak it, and rinse it well afterward.
Many showerheads have soft rubber nozzles; rubbing them with a fingertip while the water runs often pushes out loosened scale. Some heads also have a screen at the connection, and Moen's Nebia heads also have a built-in filter at the inlet to catch sediment.[5] If the soak and the nozzles do not restore the spray, a new showerhead is an easy swap; see how to replace a showerhead.
Faucet aerators
The aerator at the tip of the spout is where faucet scale collects. Moen says: "Over time, aerators can accumulate debris and mineral deposits, which can restrict water pressure or distort the spray pattern. Cleaning the aerator may improve faucet performance."[3] Most unscrew by hand; concealed aerators that thread into the spout need the small removal tool supplied with the faucet or an aerator service kit.[3] Soak the screens in diluted vinegar, rinse, and refit them in the same order.
The valves you do not see
Scale also builds up inside the shutoff valves under sinks and behind toilets, which rarely move. Maintenance is optional, but exercising the valve handle annually by moving it between the open and closed positions a few times is worth doing.[7] It helps prevent excess mineral deposit buildup inside the valve, which could impair its ability to achieve a watertight seal or cause external leaks.[7] Before you turn a valve that has not moved in years, find the home's main water shutoff, so you can stop the water if the old valve leaks or will not reopen.
Test the water and decide on treatment
If you are cleaning every few weeks, find out how hard your water is. The Virginia Household Water Quality Program maintains a list of certified laboratories,[1] and a public water utility can usually tell you its typical hardness. Virginia Cooperative Extension rates water at 7.0 to 10.5 grains per gallon as hard and above 10.5 as very hard.[1] Its guidance: "Generally, water hardness levels less than 7.0 gpg or 120 mg/L do not require treatment, and treatment is only necessary when the hardness level is causing a problem for the homeowner."[1]
"The most common way to treat hard water is through ion exchange water softening."[1] Be wary of magnetic or electronic descalers: Extension notes that no recognized agency in the United States has established protocol to assess the effectiveness of physical water treatment devices.[1] Our guide to choosing a water treatment system covers the options.
Stop and call a pro if
- A shutoff valve will not turn, or leaks at the stem after you exercise it. Leave it and have it replaced rather than forcing it.
- A valve will not reopen, or leaks steadily once turned. Close the main shutoff before you do anything else, and have the valve replaced.
- A faucet drips or a handle is stiff even after cleaning; scale may have damaged the cartridge.
- An aerator is seized and will not come off without damaging the spout.
- Pressure is low throughout the house, which can mean scale inside the pipes; see why a new faucet has low water pressure for how to tell.
- You decide on a water softener, which is plumbed into the main line and is best installed by a licensed plumber or water treatment professional.
Getting help on Loclis
Licensed plumbers on Loclis can replace scaled fixtures and valves or plumb in treatment. Browse fixture installation, find plumbers in Blacksburg, or see all plumbing answers.
If cleaning no longer helps, describe the plumbing job once and licensed local plumbers quote it.
Common questions
- Is vinegar safe on every faucet finish?
- For most finishes, Moen allows a 50/50 blend of household vinegar and water for a limited time, followed by rinsing and drying. Do not leave it soaking on the finish, and check your own maker's care guide, because finishes differ and the wrong cleaner can void a warranty.
- Is hard water bad for my health?
- No. Virginia Cooperative Extension says consuming hard water does not present a health risk and that there are no EPA drinking water standards for hardness. The problems are nuisance ones: scale on fixtures, soap scum, and reduced efficiency in water heaters.
- Do magnetic or electronic descalers work?
- Virginia Cooperative Extension notes that these devices do not change the water's hardness and that no recognized agency in the United States has set a protocol to test whether they work, so questions remain about their effectiveness. Ion exchange softeners have an established test standard.
- How often should I clean an aerator?
- Whenever the stream gets weaker or starts spraying sideways. Moen notes aerators gather debris and mineral deposits over time and that cleaning may improve performance.
- Where can I get my water tested in Virginia?
- The Virginia Household Water Quality Program, run through Virginia Cooperative Extension, keeps a list of certified laboratories and holds county water testing clinics. If you are on a public system, your water utility can also tell you its typical hardness.
Sources
- [1] Virginia Household Water Quality Program: Hardness in Household Water (442-664), Virginia Cooperative Extension, Virginia Tech. Checked October 26, 2026.
- [2] Faucet Finish Care and Cleaning, Moen. Checked October 26, 2026.
- [3] Faucet Aerator Cleaning, Moen. Checked October 26, 2026.
- [4] How does Nebia by Moen handle hard water (or lime scale)?, Moen. Checked October 26, 2026.
- [5] How do I clean my Nebia by Moen showerhead?, Moen. Checked October 26, 2026.
- [6] How to Turn Off the Water Supply to the Faucet, Moen. Checked October 26, 2026.
- [7] Oatey 101: Stops and Supply Lines, Oatey. Checked October 26, 2026.
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