Can I clean the aerator without removing it?

No. You must remove the aerator to access the mesh screen where minerals collect. Cleaning it in place is not effective because the buildup is inside the housing.

What if the aerator is too corroded to remove?

Apply penetrating oil or vinegar to the threads and let it sit for 10–15 minutes. If it still won't budge, you may need to replace the entire aerator. Faucet aerators are inexpensive and available at hardware stores.

Does cleaning the aerator really save water?

Yes. A clogged aerator can cause you to run the tap longer to fill pots or wash hands, wasting water. Restoring the proper flow rate means the faucet uses water as designed, which is especially important for low-flow aerators that already limit consumption.

Can I use vinegar on a brass or nickel aerator?

Yes, short soaking in vinegar is safe for most metal finishes. Avoid prolonged soaking (over an hour) and never boil the parts, as that can damage rubber washers and some coatings. Rinse thoroughly afterward.

How to Clean a Clogged Faucet Aerator and Restore Water Flow

Why Does My Faucet Flow Slow Down?

If your kitchen faucet has gradually lost pressure, the aerator is usually the culprit. The aerator is a small mesh screen at the tip of the spout that mixes air into the water stream. Over time, mineral deposits from hard water—mainly calcium and magnesium—build up on the screen and inside the aerator body, restricting flow.

A clogged aerator does more than annoy you. It forces the water heater to work harder, and it can make you run the tap longer to fill a pot, wasting water. Restoring the aerator to a clean state brings back a strong, even stream and helps the faucet perform at its designed flow rate.

Other causes of low flow include a partially closed shutoff valve under the sink or a kinked supply line. But before calling a plumber, checking the aerator is a quick, free fix that solves the problem in most cases.

Close-up of a faucet aerator with visible white mineral deposits on the mesh screen

How Do I Remove the Aerator?

Most aerators screw off by hand. Grip the knurled edge of the aerator and turn it counterclockwise, looking at the spout from below. If it is stuck, wrap the jaws of pliers with masking tape or use a rubber band to protect the finish, then grip and turn. A strap wrench also works well and avoids scratches.

If the aerator does not turn, it may be seized by mineral deposits. Spray the threads with a penetrating oil or white vinegar and let it sit for several minutes before trying again. Never use excessive force, as you can damage the spout or the aerator housing.

Some faucets have a hidden aerator that requires a special key tool. If your aerator has two small holes on its side, use a key or a flathead screwdriver to unscrew it. Once removed, take the aerator apart: you will see the outer housing, the mesh screen, and often a rubber washer.

Turn off the water supply under the sink before removing the aerator.
Wrap pliers with tape or use a rubber grip to avoid scratching.
Use a penetrating oil or vinegar if the aerator is stuck.
Keep the small parts in order so you can reassemble them correctly.

What's the Best Way to Clean the Mineral Deposits?

White vinegar is the most reliable cleaner for mineral buildup because its mild acid dissolves calcium and magnesium without damaging the metal or rubber parts. Place the disassembled aerator parts in a small bowl and cover them with white vinegar. Let them soak for 15 to 30 minutes, depending on how heavy the buildup is.

For heavy scale, you can heat the vinegar in the microwave until warm (not boiling) to speed up the reaction. After soaking, scrub the screen gently with an old toothbrush to dislodge remaining particles. Rinse every part thoroughly under running water.

If you do not have vinegar, a commercial descaler or a 50/50 mix of lemon juice and water works similarly. Avoid harsh abrasive pads or metal brushes, which can damage the mesh and shorten the aerator's life.

Cleaning method	Best for	Time
White vinegar soak	Light to heavy mineral buildup	15–30 minutes
Warm vinegar soak	Heavy scale	10–15 minutes
Commercial descaler	Stubborn deposits	Follow label instructions
Lemon juice and water	Light buildup	15 minutes

How Do I Reassemble and Reinstall the Aerator?

Lay the parts out in the order they came out. Most aerators stack like this, from the spout outward: the rubber washer goes against the spout, then the mesh screen, then the outer housing. Some designs include a plastic flow restrictor or a second screen—keep the sequence intact.

Hand-tighten the aerator back onto the spout, turning clockwise. Do not overtighten; a snug fit is enough to prevent leaks. Turn the water supply back on and check the flow. A clean aerator should produce a steady, full stream with no splashing or sputtering.

If the flow is still weak after cleaning, the problem may be inside the faucet body or supply lines. At that point, consider replacing the aerator—they are inexpensive—or consult a plumber if the issue persists.

Disassembled faucet aerator showing mesh screen, rubber washer, and outer housing arranged in order

How Often Should I Clean the Aerator?

In areas with hard water, check the aerator every three to six months. A quick visual inspection—unscrew it and look at the screen—tells you whether it needs cleaning. If you see white or greenish crust, soak it in vinegar right away.

Even with soft water, aerators collect small particles and sediment from the supply. Cleaning once a year keeps the flow consistent and extends the life of the faucet. Regular cleaning also helps maintain the aerator's water-saving function: a clogged aerator can reduce flow efficiency, but a clean one delivers the intended low-flow performance.

If you notice a sudden drop in pressure after a plumbing repair or water main work, sediment may have entered the lines. In that case, clean the aerator sooner rather than later, and consider installing a mesh filter on the supply line if the problem recurs.