Unclog and Descale a Showerhead

Showerheads clog from the inside out, usually without you realizing it until the spray pattern looks like a broken sprinkler. The culprit is almost always mineral deposits—calcium and magnesium left behind when hard water evaporates inside the tiny nozzles. The good news is this isn't a failure of the showerhead itself; it's a maintenance task that takes an afternoon and costs nothing but vinegar. You'll know you've done it right when the water pressure returns to its original force and the spray pattern becomes uniform again.

1. Determine If You Can Remove It. Turn off the water and examine where the showerhead connects to the arm. If there's a large nut or collar, grip it with an adjustable wrench while holding the shower arm steady with your other hand. Turn the nut counterclockwise until the showerhead comes free. If the showerhead is permanently soldered or glued, you'll descale it in place using the immersion method below.
2. Gather Your Vinegar. Fill a plastic bag, small bucket, or measuring cup with white vinegar—distilled is best because it has no added minerals. You need enough vinegar to fully submerge the showerhead. If the showerhead can't be removed, you'll still use vinegar but in a different application method.
3. Dissolve Minerals in Vinegar. Place the showerhead face-down in the vinegar so the nozzle end is completely submerged. Leave it for 4-8 hours. If deposits are very heavy or crusted, leave it overnight. The acetic acid in vinegar dissolves calcium and magnesium carbonate without chemicals or scrubbing at this stage.
4. Brush Away Softened Deposits. Remove the showerhead from the vinegar and use an old toothbrush to gently scrub the face of the showerhead, paying special attention to each individual hole. Work the bristles into the nozzles to dislodge any remaining mineral fragments. You'll see white powder and debris come away. Don't use excessive force—the bristles are enough to break loose deposits that vinegar has already softened.
5. Blast Out Loosened Debris. Hold the showerhead under hot running water and direct the spray through all angles, letting water push debris out. If you have removable showerhead, you can also hold it upside down and run water backward through the arm connection. This flushes out loose particles and vinegar residue that's still inside the channels.
6. Needle Out Clogged Nozzles. If some nozzles still show reduced flow after brushing, use a thin needle, safety pin, or straightened paperclip to carefully probe each hole. Work gently to avoid enlarging the opening or damaging the showerhead material. Push the needle straight in and out a few times to clear the channel. Follow up immediately with a flush of hot water.
7. Second Soak for Stubborn Deposits. If water flow is still weak after brushing and probing, return the showerhead to a fresh vinegar soak for another 4-6 hours. Severe deposits from hard water or years of neglect sometimes need multiple cycles. This is normal and not a sign something is wrong with the showerhead.
8. Reattach With Sealed Threads. If you removed the showerhead, wrap the male threads (the part that threads into the arm) with plumber's thread seal tape, wrapping clockwise 3-4 times. Screw the showerhead back onto the arm by hand first, then tighten with a wrench. Don't over-tighten—firm is enough to prevent leaks.
9. Verify Full Pressure and Pattern. Turn on the water and let it run for 30 seconds. Feel the pressure against your hand and look at the spray pattern. It should be full and uniform across all nozzles, not thin or concentrated. If pressure is still low, one or more nozzles may still be clogged; return to the needle-probe step or soak again.
10. Soak Fixed Heads in Vinegar Bag. For showerheads that can't be removed, fill a plastic bag with vinegar and secure it over the nozzle with rubber bands or a zip tie, making sure the face is fully submerged inside the bag. Leave it for 8-12 hours. Remove the bag and use a toothbrush and needle to clean the nozzles the same way as removable heads, then flush thoroughly with hot water.
11. Monthly Flush Prevents Future Clogs. Once a month, let hot water run through the showerhead at full flow for 30 seconds. This periodic flush prevents mineral buildup from accumulating and keeps clogs from returning. In very hard water areas, do this weekly.