A shower head rarely fails all at once. One jet goes crooked, then another quits, then the spray that used to fill the shower turns into a few sharp needles and a sad trickle down the middle. That pattern is almost always mineral scale — calcium and magnesium from hard water plating the inside of each tiny nozzle until the opening narrows shut. The fix costs about a dollar in vinegar and asks nothing of you but patience.
Fill and fit the bag. Pour 1–2 cups of white vinegar into the bag — enough to submerge the face of the shower head once it is on. Lift the bag up over the head so every nozzle sits under the surface, then fasten it to the shower arm with the rubber band or zip tie, snug enough that it cannot slide off overnight.
Leave it 6–8 hours. Overnight is the easy schedule. Light scale may loosen in 2–3 hours, but heavy crust — the kind you can feel as grit when you rub a nozzle — needs the long soak. The acid only works while it is in contact, which is why the bag beats a spray bottle: nothing runs off or dries out.
Rub the nozzles. Bag off, vinegar down the drain. Most modern heads have soft rubber nozzles, and flexing each one between your fingers breaks up the loosened scale inside it — this step does as much as the soak. Stubborn crust on the face gets a pass with the old toothbrush.
Flush it out. Run the shower hot and full for a minute. Loosened grit washes out of the head and down the drain, and the spray pattern should look even again. Any jet still misbehaving gets another finger-flex with the water running, which usually pops the last fragment clear.
Cleaning only fixes a clogged head. Three quick checks separate that from a supply or pressure fault, so you do not soak a healthy head twice and wonder why nothing changed.
| What you notice | Points to |
|---|---|
| Some jets strong, some weak or spraying sideways | Clogged nozzles — soak it |
| Every jet weak, but the spray pattern is even | Flow or pressure, not scale |
| Tub faucet runs strong, shower runs weak | The head or its inlet screen |
| Every faucet in the house is weak | House supply — a bigger question |
The bucket test settles it: run the shower into a bucket for exactly one minute and measure. A modern head is rated around 1.8–2.5 gallons per minute, so a bucket holding close to that range means the head is passing what it should and the weak feel is pressure, not clog. If the whole house reads low, the trail leads away from the bathroom — our guide to why your water pressure is so low works through those causes in order.
Do not poke the nozzles with pins or drill bits. Enlarging a nozzle opening deforms the jet permanently, and metal tools chew up the rubber. Flexing clears rubber nozzles; vinegar clears the rest.
Do not soak chrome or fancy finishes for a full day. Overnight is the sweet spot. Soaks stretching past 12 hours can dull some finishes, especially brushed and oil-rubbed ones — the same caution applies to fixtures generally, and our rundown on removing hard water stains covers which surfaces tolerate acid and which, like natural stone, never should.
Do not mix vinegar with bleach cleaners. If the shower was just cleaned with a bleach product, rinse everything with plain water first. Acid plus bleach makes chlorine gas.
Soak twice with no improvement, and the head itself is likely done: internal parts scale beyond reach, the face plate is cracked, or the finish is flaking into the water path. Heads are wear items with a typical life of 5–10 years in hard-water homes, and a replacement costs $20–$60 for a solid mid-range model. Swapping one is a wrench-and-tape job — our walkthrough on replacing a showerhead covers it in about 20 minutes, no plumber needed.
Keeping it from coming back is mostly habit: a 2-hour bag soak every 3–6 months stops scale before it hardens into the overnight kind. Rubbing the nozzles for ten seconds whenever you clean the shower helps more than it sounds.
A crooked, needly spray is scale in the nozzles, and scale dissolves in vinegar. Bag it overnight, flex the rubber nozzles, flush for a minute. If the spray comes back even, you are done for the cost of a cup of vinegar. If it stays uniformly weak with the bucket test low, the head was never the problem — follow the pressure trail instead.
Six to eight hours handles most buildup — overnight is the practical schedule. Light film may clear in 2–3 hours. Very heavy crust can take a second soak. Keep soaks under about 12 hours on chrome and specialty finishes, which long acid exposure can dull.
Yes — that is exactly what the bag method is for. The bag ties to the shower arm and holds vinegar over the face of the head while it stays mounted. Removal only helps if you also want to rinse the inlet screen inside the connection, which is worth doing on heads that unscrew by hand.
If every jet is weak but the pattern is even, the head is probably clear and the limit is flow or pressure. Check the inlet screen for grit, then run the one-minute bucket test: near 1.8–2.5 gallons points to house pressure; well under it points back at the head or the shower valve.
Plain white vinegar is the right pick: it is a consistent 5% acidity, cheap, and leaves nothing behind. Apple cider vinegar works chemically but costs more and can leave color and residue. Cleaning vinegar at 6% is slightly stronger and fine to use, undiluted, the same way.
Every 3–6 months in hard-water homes, and once or twice a year where water is soft. The first crooked jet is your early warning — a short soak at that stage takes 2 hours, while waiting until half the nozzles are dead means the full overnight treatment.