Descale a Showerhead

Hard water leaves its signature everywhere, but nowhere quite as visibly as on a showerhead. Those white crusty deposits clogging the spray nozzles are mineral scale—mostly calcium and magnesium—and they choke water flow down to a disappointing dribble. Left long enough, scale hardens into stone-like deposits that resist casual cleaning. But vinegar's acetic acid dissolves these minerals efficiently, and a proper descaling takes less than an hour of active work. The difference is immediate: full pressure, even spray pattern, and a showerhead that looks new again. This is preventive maintenance that pays back every month you skip buying a replacement.

1. Remove the showerhead if possible. Unscrew the showerhead from the shower arm by turning counterclockwise. Most unscrew by hand, but if it's stuck, wrap the connector nut with a cloth and use adjustable pliers with light pressure. If the showerhead is fixed or you'd rather not disconnect it, you'll clean it in place.
2. Fill a container with white vinegar. Pour undiluted white vinegar into a bowl or plastic bag large enough to submerge the showerhead face. For fixed showerheads, use a plastic bag you can secure around the head with a rubber band or zip tie.
3. Submerge and soak the showerhead. Place the removed showerhead face-down in the vinegar bowl, ensuring all nozzle holes are covered. For fixed heads, pull the vinegar-filled bag up over the showerhead and secure it tightly so the head sits fully submerged. Let it soak for 30 minutes for light buildup, up to 2 hours for heavy scale.
4. Scrub the nozzle face. Remove the showerhead from the vinegar and use an old toothbrush to scrub the nozzle plate in circular motions. Pay attention to each spray hole, working the bristles into the openings to clear loosened deposits. Stubborn scale yields to a toothpick or safety pin poked gently through each hole.
5. Flush the showerhead internals. Run hot water through the showerhead by holding it under a faucet with full pressure, or briefly reconnect it and run the shower. This clears loosened scale from inside the head and its internal channels. Shake it vigorously while flushing to dislodge trapped particles.
6. Clean the shower arm threads. While the showerhead is off, wrap a vinegar-soaked cloth around the exposed shower arm threads and let it sit for 10 minutes. Wipe clean and inspect the rubber washer inside the showerhead connector—replace it if it's cracked or flattened.
7. Reattach and test the showerhead. Screw the showerhead back onto the shower arm by hand, turning clockwise until snug. Use pliers only if necessary, and stop when resistance increases—overtightening cracks plastic connectors. Turn on the shower and check the spray pattern across all nozzles.
8. Wipe down and prevent future buildup. Dry the showerhead face thoroughly with a microfiber cloth to prevent new water spots. Going forward, wipe the nozzle plate after each shower while it's still wet, or spray it weekly with a 50-50 vinegar-water solution to slow mineral accumulation.