Remove Mineral Deposits from Showerheads and Faucet Aerators

Mineral deposits—limescale, calcium, and magnesium buildup—choke showerheads and aerators over time, reducing water flow and creating uneven spray patterns. The deposits come straight from your water supply and accumulate faster in hard-water areas. Left unchecked, they eventually block holes entirely, forcing you to replace the part. The good news is that mineral deposits dissolve in acid, and you already have what you need in your pantry. This fix takes one afternoon and costs almost nothing. Done well, you get full water pressure back and spray patterns that actually work.

1. Unscrew Without Damage. Turn the showerhead counterclockwise by hand. If it's stuck, wrap an old towel around it for grip and turn slowly—force can crack the fitting or the chrome finish. For faucet aerators, they're usually threaded onto the tip of the spout; turn counterclockwise with your fingers or a small adjustable wrench if necessary. Some aerators have a decorative collar; unscrew the collar first, then the aerator itself.
2. Assess the Damage. Look at the holes in the showerhead face or aerator. White, chalky crusts indicate calcium deposits. Check inside the threaded portion where the water inlet is—mineral deposits often accumulate there too. Make a mental note of which areas are most blocked so you can focus your soaking and scrubbing there.
3. Mix Your Dissolving Agent. Use a glass or plastic bowl, jar, or even a sandwich bag if you're working on an aerator. Pour enough white vinegar to fully submerge the part. Standard 5% white vinegar from the grocery store works perfectly—no need for cleaning vinegar or apple cider. If using a bag, squeeze out excess air and seal it, then place the bag in a bowl to catch drips.
4. Let Acid Do the Work. Place the showerhead or aerator directly into the vinegar. Make sure all surfaces are covered, especially the face where water exits. Leave it undisturbed. For light deposits, 4 hours is enough. For heavy, thick buildup, overnight (8 hours) gives the acid time to dissolve mineral bonds completely. Check after 4 hours; if deposits are visibly softer and whitish instead of hard and crystalline, you can move to scrubbing.
5. Flush Out Loosened Deposits. Take the showerhead or aerator out of the vinegar and hold it under running tap water. Rinse away the loosened mineral debris and vinegar smell. Don't scrub yet—just rinse. You'll see white residue and flakes come away. Use your fingers to gently rub away easily loosened material.
6. Brush Away Residue. Use an old toothbrush or a soft brass brush to scrub the holes and surfaces where deposits remain. Focus on the spray face—each hole should be cleaned individually. Work the brush in circular motions and don't press hard; the soaking has already softened most of the deposit, and excessive force can damage seals or crack plastic aerators. For aerators with internal screens, gently brush those too if they're accessible.
7. Verify Clean Surfaces. Hold the part under the tap and let water flow through the holes and threaded sections. Turn it around so water reaches all surfaces. Run your finger over the spray face—it should feel smooth, not gritty. If you feel remaining grit, repeat the vinegar soak for another 4 hours and scrub again, but most of the time one cycle is enough.
8. Prepare to Reinstall. Wipe the showerhead or aerator dry with a clean cloth. Inspect the threads—they should be clean and free of mineral deposits. Check that no internal seals or gaskets are damaged from soaking. If the part is plastic and the vinegar has made it feel sticky or soft, let it air-dry for 30 minutes before reinstalling.
9. Secure Without Over-Tightening. Screw the part back onto the fitting by hand, turning clockwise. Tighten firmly but don't over-torque—hand-tight plus a quarter turn is enough. If using a wrench on an aerator, hold the spout steady with your other hand so you don't bend the faucet. For showerheads, the weight of the head provides most of the tightness; you're just ensuring it doesn't leak.
10. Confirm Full Pressure. Turn on the water and check the showerhead or faucet. The flow should be noticeably stronger than before, and the spray pattern should be even—no weak streams or dead spots. If the spray is still uneven or weak, mineral deposits may remain inside the internal valve (not the aerator itself), which requires a different approach.