How to Clean Dishwasher Spray Arms: Step-by-Step Guide

Dishwasher spray arms play a major role in getting your dishes clean.

During a wash cycle, water is pushed through small openings in the spray arms and distributed throughout the dishwasher.

Over time, food debris or mineral buildup may collect around those openings. A plate, utensil, or pan can also block the spray arms from rotating correctly.

When that happens, you may notice dirty dishes, uneven cleaning, or areas of the dishwasher that do not seem to receive enough water.

Fortunately, inspecting and cleaning accessible dishwasher spray arms is usually straightforward.

Important: Dishwasher spray-arm designs vary considerably. Always check your owner's manual before removing a spray arm or using any cleaning product. Do not force components apart.

What Do Dishwasher Spray Arms Do?

Dishwasher spray arms distribute water around the dishwasher during a wash cycle.

Depending on the model, your dishwasher may have:

• Lower spray arm

• Upper spray arm

• Middle spray arm

• Ceiling-mounted spray system

• Additional specialized jets

Not every dishwasher uses the same design.

The spray arms may rotate as water moves through them, allowing water and detergent to reach different areas of the load.

If spray holes become blocked or an arm cannot move correctly, cleaning performance may suffer.

Signs Your Dishwasher Spray Arms May Need Cleaning

Check the spray arms if you notice:

• Food remaining on dishes

• Uneven cleaning

• Some dishes staying unusually dry

• Visible debris in spray holes

• Mineral buildup around spray openings

• Spray arms not moving freely when the dishwasher is off

• Rattling or knocking during operation

• A sudden decline in cleaning performance

These symptoms do not automatically mean the spray arms are dirty.

Other causes can include:

• Improper loading

• Dirty dishwasher filter

• Water-supply problems

• Detergent problems

• Circulation-pump problems

• Mechanical issues

For more troubleshooting, read Why Is My Dishwasher Not Spraying Water? 7 Common Causes and Fixes.

What You'll Need

For basic spray-arm cleaning, gather:

• Warm water

• Soft microfiber cloth

• Soft-bristled brush or old toothbrush

• Clean towel

• Your dishwasher owner's manual

You may also need a manufacturer-approved dishwasher cleaner or descaling product if your manual recommends one for mineral deposits.

Avoid:

• Metal picks

• Knives

• Drill bits

• Wire brushes

• Abrasive scrubbers

• Anything that could enlarge the spray holes

Do not assume vinegar, bleach, baking soda, citric acid, or another household cleaner is appropriate for your dishwasher.

How to Clean Dishwasher Spray Arms

Step 1: Empty the Dishwasher

Remove all:

• Dishes

• Glassware

• Silverware

• Pots and pans

• Loose items

Make sure the dishwasher is turned off and not running.

Follow your manufacturer's maintenance and safety instructions.

Step 2: Remove the Lower Rack

Pull the lower rack out if necessary to access the lower spray arm.

Some dishwashers may also require the upper rack to be adjusted or removed to reach an upper spray arm.

Only remove racks according to your owner's manual.

Step 3: Check for Loading Obstructions

Before assuming the spray arm itself is clogged, look for evidence that dishes may have blocked it.

Common problems include:

• Long utensils hanging below a rack

• Large plates

• Cutting boards

• Pots

• Pans

• Lightweight items that moved during the cycle

With the dishwasher off, gently check whether accessible spray arms can move without hitting anything.

Do not force them.

Step 4: Inspect the Spray Arms

Look closely at each accessible spray arm.

Check for:

• Food particles

• Grease

• Mineral deposits

• Visible clogs

• Cracks

• Warping

• Loose attachments

• Damaged spray holes

Use good lighting so you can see the small openings clearly.

Step 5: Check Whether the Spray Arms Move Freely

With the dishwasher completely off, gently move or rotate the accessible spray arms if your model is designed to allow it.

They should not be obstructed by dishes or utensils.

Do not try to observe or touch the spray arms while the dishwasher is operating.

If an arm feels stuck despite there being no visible obstruction, check the owner's manual before taking anything apart.

How to Clean Spray Arms Without Removing Them

Some spray arms may be cleaned while they remain installed.

If your manual allows this:

1. Wipe the exterior with a damp microfiber cloth.

2. Use a soft brush around visible spray holes.

3. Remove loose food debris you can safely reach.

4. Wipe away visible residue.

5. Follow your manufacturer's method for mineral buildup.

Do not force tools into the openings.

Never enlarge spray holes.

How to Clean Removable Dishwasher Spray Arms

If your owner's manual confirms that a spray arm is designed for homeowner removal, follow the exact instructions for your model.

Spray arms may attach in different ways.

Some may:

• Lift off

• Twist

• Use a retaining nut

• Use a clip

• Require another model-specific procedure

Do not assume yours should unscrew or twist simply because another dishwasher does.

Step 1: Remove the Spray Arm

Follow the manual carefully.

If it does not come off easily in the way described, stop.

Do not force plastic components.

Step 2: Rinse the Spray Arm

Rinse the removable arm under warm running water if your manufacturer allows it.

Allow water to flow through the spray openings.

Step 3: Brush Away Debris

Use a soft brush to clean:

• Exterior surfaces

• Around spray holes

• Crevices

• Areas where residue has collected

Avoid abrasive tools.

Step 4: Clear Accessible Spray Holes

Remove only debris that can be safely reached using the method recommended by your dishwasher manufacturer.

Do not use:

• Needles

• Metal wire

• Knives

• Drill bits

• Screws

• Sharp metal objects

These can damage or enlarge the spray openings and change the water pattern.

Step 5: Address Mineral Buildup

If you see white or chalky mineral deposits, check your owner's manual.

Some manufacturers recommend a particular dishwasher cleaner or descaling method.

Do not automatically soak the spray arms in vinegar or another acidic cleaner.

Materials and manufacturer recommendations vary.

Step 6: Rinse Thoroughly

Rinse away loosened debris and any manufacturer-approved cleaning product.

Step 7: Reinstall the Spray Arm

Put the spray arm back exactly as directed.

Make sure it is:

• Properly positioned

• Securely attached

• Able to move normally

• Not interfering with racks or dishes

Never run the dishwasher with required components improperly installed.

What If the Spray Arms Are Not Removable?

That's okay.

Not every spray arm is intended for homeowner removal.

If yours does not come off according to the manual:

• Leave it installed.

• Wipe accessible surfaces.

• Clean visible spray holes using the approved method.

• Remove loose debris.

• Run the manufacturer-recommended maintenance cycle if appropriate.

Do not force the spray arm off.

Do not use vinegar and baking soda as a substitute for the manufacturer's instructions.

How to Tell If Spray Holes Are Clogged

Look closely at the spray openings.

Possible signs include:

• Visible food particles

• White mineral deposits

• Greasy residue

• Uneven-looking openings

• Water residue around blocked holes

Cleaning should focus on removing debris without damaging the spray opening itself.

If an opening appears physically damaged rather than clogged, the spray arm may need replacement.

Food Debris vs. Mineral Buildup

Food Debris

Possible debris includes:

• Seeds

• Rice

• Pasta

• Vegetable pieces

• Food particles

• Small labels

Loose debris may often be removed with warm water and gentle brushing.

Mineral Buildup

Hard water may leave white or chalky deposits around spray holes.

If this occurs, use the descaling method approved by your dishwasher manufacturer.

Do not assume a popular household cleaner is safe for every dishwasher.

How Often Should You Clean Dishwasher Spray Arms?

There is no single schedule for every dishwasher.

Follow your manufacturer's maintenance recommendations.

A practical habit is to inspect the spray arms whenever you clean or inspect the dishwasher filter.

You may want to check them sooner if:

• Dishes suddenly come out dirty.

• Spray holes visibly look clogged.

• You notice mineral deposits.

• Water coverage appears uneven.

• You hear rattling or knocking.

• Cleaning performance declines.

Routine inspection is often more useful than following an arbitrary cleaning calendar.

How to Prevent Dishwasher Spray-Arm Clogs

Scrape Large Food Scraps

Remove large scraps before loading dishes.

You usually do not need to completely wash every plate first, but bones, large food pieces, labels, and other debris should not enter the dishwasher.

Keep the Filter Clean

If your dishwasher has a user-cleanable filter, maintain it according to the manufacturer's instructions.

For detailed instructions, read How to Clean a Dishwasher Filter: Step-by-Step Guide.

Load the Dishwasher Correctly

Make sure dishes do not block spray-arm movement.

Pay particular attention to:

• Long utensils

• Large plates

• Cutting boards

• Pots

• Pans

Don't Overload the Racks

Crowded racks can interfere with water distribution.

Follow the loading recommendations for your dishwasher.

Use the Correct Detergent

Use detergent made for automatic dishwashers.

Follow both the detergent and dishwasher manufacturer's directions.

Address Hard-Water Buildup

If mineral deposits are common in your dishwasher, follow the manufacturer's recommended maintenance or descaling procedure.

Common Dishwasher Spray-Arm Cleaning Mistakes

Removing Spray Arms Without Checking the Manual

Dishwasher designs vary.

Never assume the arm comes off the same way as one shown in an online video.

Forcing the Spray Arm Off

Plastic dishwasher components can crack.

If the arm does not release as described in the manual, stop.

Using Sharp Metal Objects

Do not push needles, wire, knives, or similar objects into spray holes.

They can damage the arm.

Enlarging Spray Holes

Making an opening larger can affect the spray pattern and cleaning performance.

Using Vinegar Automatically

Vinegar is not a universal dishwasher cleaner.

Follow your manufacturer's recommendations.

Mixing Cleaning Products

Never combine household cleaning chemicals.

Running the Dishwasher With Parts Missing

Reinstall all required components before operating the dishwasher.

Ignoring the Filter

Spray-arm problems and filter problems can sometimes occur together.

Check both when cleaning performance suddenly declines.

What If the Spray Arm Is Damaged?

Cleaning will not repair a cracked, warped, broken, or badly worn spray arm.

Possible signs of damage include:

• Visible crack

• Split plastic

• Missing piece

• Spray arm repeatedly detaches

• Arm will not remain positioned correctly

• Damaged spray opening

• Arm physically strikes other dishwasher components

Check the manufacturer's replacement instructions.

If replacement requires internal disassembly, contact an appliance professional.

What If Cleaning the Spray Arms Doesn't Help?

If the spray arms are clean but dishes still are not getting enough water, another problem may be responsible.

Possible causes include:

• Dishwasher not filling with enough water

• Dirty filter

• Loading problem

• Detergent issue

• Circulation-pump problem

• Motor problem

• Sensor problem

• Internal mechanical issue

Read Why Is My Dishwasher Not Spraying Water? 7 Common Causes and Fixes for more troubleshooting.

If the dishwasher fills normally but does not circulate water, professional service may be necessary.

When to Call an Appliance Professional

Consider professional help if:

• Spray arms do not appear to function after cleaning.

• Spray arm is cracked or damaged.

• Dishwasher fills but does not circulate water.

• You hear grinding or unusual mechanical noises.

• Error codes repeatedly appear.

• Dishwasher leaks.

• Spray arm will not remain attached.

• Cleaning does not improve performance.

• Repair requires access to the pump, motor, wiring, or internal components.

Do not disassemble the circulation pump, motor, electrical controls, or internal plumbing just to investigate a spray problem.

Frequently Asked Questions

Can I clean dishwasher spray arms myself?

Often, yes.

Accessible spray arms can usually be inspected and cleaned using your manufacturer's instructions.

Only remove them if your model specifically allows homeowner removal.

How do I know if my dishwasher spray arms are clogged?

Look for visible food particles, mineral deposits, blocked spray holes, or poor water coverage.

Dirty dishes and uneven cleaning may also be clues.

Can I use a toothpick to clean the holes?

Do not automatically use a toothpick or another object.

Some manufacturers may permit a non-damaging tool, while others may recommend a different method.

Follow your model's instructions.

Can I soak dishwasher spray arms in vinegar?

Do not assume vinegar is appropriate for every dishwasher.

Use the cleaning or descaling method recommended by your manufacturer.

Can I use baking soda?

Check your dishwasher manufacturer's instructions before putting baking soda or another household product into the appliance.

Should spray arms spin freely?

Accessible spray arms generally need to move as designed without being blocked by dishes or utensils.

The amount and type of movement varies by model.

Do not force them.

Why does my dishwasher spray arm keep getting clogged?

Possible contributors include:

• Food debris

• Mineral buildup

• Dirty filter

• Large scraps entering the dishwasher

• Maintenance issues

Regular inspections can help catch buildup early.

Can hard water clog dishwasher spray arms?

Mineral deposits from hard water may build up around spray openings.

Follow your manufacturer's recommended descaling procedure.

Why are my dishes still dirty after cleaning the spray arms?

The cause may be something else, including:

• Dirty filter

• Loading problems

• Water-supply issue

• Detergent problem

• Incorrect cycle

• Circulation-pump problem

Final Thoughts

Dishwasher spray arms are easy to overlook, but keeping them clear can help your dishwasher distribute water effectively.

Start by checking for loading obstructions, visible debris, clogged spray holes, and mineral buildup.

Clean only the parts you can safely access, remove spray arms only if your owner's manual says they are designed for homeowner removal, and never force components apart.

Most importantly, avoid sharp tools and one-size-fits-all cleaning mixtures.

If the spray arms are clean but your dishwasher still does not seem to circulate water, the problem may involve the water supply, filter, pump, motor, or another internal component that requires additional troubleshooting or professional service.