A dishwasher saves time by taking care of dirty plates, greasy pans and everyday kitchen mess. But have you ever opened it after a wash and noticed a strange smell, cloudy glasses or bits of food stuck to your dishes?

It is easy to assume that a machine designed to clean things will keep itself clean. In reality, food particles, grease, detergent residue and moisture can build up inside a dishwasher over time. The filter, spray arms and rubber door seal are common places where this residue collects.

The good news is that you usually do not need special equipment or an expensive cleaning service to deal with it. A little routine maintenance can help keep your dishwasher fresh and prevent some common cleaning problems.

In this guide, you will learn how to clean a dishwasher step by step, which parts deserve extra attention, how often to clean them and which mistakes to avoid. If you’re still deciding whether a dishwasher is right for your household, read our guide on whether a dishwasher is worth it for an Indian kitchen.

1. Why Should You Clean Your Dishwasher?

Your dishwasher deals with dirty dishes every day, so some residue inside the machine is normal. The problem starts when that residue is left to accumulate. Here is why regular cleaning matters:

• It helps control unpleasant smells: Food scraps trapped in the filter or around the door seal can develop an unpleasant smell, especially when the machine stays damp between washes.
• It helps water reach your dishes properly: Blocked spray-arm holes can interfere with water distribution. Checking them is a useful first step when dishes are not coming out clean.
• It removes built-up residue: Grease, detergent deposits and mineral marks may collect on different surfaces. Cleaning the appropriate parts helps keep the interior in better condition.
• It makes routine maintenance easier: Cleaning small areas regularly is generally less work than waiting until the filter is heavily coated or the machine develops a persistent smell.

Cleaning does not guarantee that every dishwasher problem will disappear. If the machine still leaves dishes dirty after maintenance, there may be another cause, such as loading issues, a blocked drain or a component that needs attention.

2. What You Need Before You Start

You probably already have most of the items needed for basic dishwasher cleaning.

• A soft cloth or microfiber cloth
• A soft cleaning brush or an old, clean toothbrush
• Warm water
• A small bowl or container for rinsing removable parts
• A dishwasher cleaner, if recommended for your model
• Your dishwasher’s user manual

You do not need to use every cleaning product you have at home. In fact, using too many products can cause problems.

Avoid mixing cleaning chemicals. Do not use ordinary dishwashing liquid inside the machine because it can produce excessive foam. Before using vinegar, baking soda or another home remedy, check whether the manufacturer recommends it. Some products may not be suitable for particular finishes, seals or components.

3. How to Clean a Dishwasher Step by Step

Step 1: Empty the Dishwasher and Remove Loose Food

Start with an empty dishwasher. Remove the racks if your model allows you to take them out easily, and check the bottom of the machine for visible food scraps.

Pick out any large pieces of food you can see. You do not need to scrub the entire interior yet. The aim is simply to clear away loose debris before cleaning the individual parts.

If you have recently run a hot cycle, allow the machine to cool before reaching inside. Be careful around any exposed heating element or sharp edges.

Step 2: Remove and Clean the Filter

The filter is one of the first places to check when your dishwasher smells unpleasant or leaves food particles on plates.

Most dishwashers have a filter near the bottom of the tub, although its design and removal method vary by model.

Here is how to clean it:

1. Check the user manual to find out how the filter is removed.
2. Carefully take it out without forcing or twisting it in the wrong direction.
3. Rinse it under running water to remove loose food and residue.
4. Use a soft brush to loosen deposits that do not rinse away easily.
5. Check the filter housing for trapped debris and wipe the accessible area.
6. Refit the filter securely, following the instructions for your model.

Do not use a hard wire brush or an abrasive scrubber that could damage the filter.

A dirty filter can contribute to poor cleaning results and unpleasant smells, but it is not the only possible cause. If the problem continues after cleaning, check the manufacturer’s troubleshooting guidance.

For detailed instructions, see Bosch India’s guide to cleaning a dishwasher filter.

Step 3: Check the Spray Arms

The spray arms distribute water around the dishwasher. If their small openings become blocked, water may not reach every part of the load as intended.

To clean them:

1. Check the manual to see whether the spray arms can be removed.
2. Inspect the holes for food particles or visible mineral deposits.
3. Rinse removable arms with water.
4. Use a soft brush to loosen debris around the openings.
5. Reinstall the arms correctly and make sure they can rotate freely.

Avoid pushing sharp objects deep into the holes, as this may damage the spray arms. If a blockage will not come out easily, follow the manufacturer’s instructions rather than forcing it.

It is worth checking the spray arms if you regularly find food stuck to dishes, particularly when the filter is already clean.

Step 4: Wipe the Rubber Door Seal

The rubber seal around the dishwasher door can collect moisture, grease and food residue. Because it is not always reached by the main wash jets, it can be easy to overlook.

Open the door and gently wipe the seal with a soft, damp cloth. Pay attention to the folds and corners, where residue can collect.

For stubborn dirt, use a soft brush and a cleaning method approved by the manufacturer. Avoid pulling hard on the rubber or using harsh chemicals that could damage it.

Once you have finished, wipe the area with a clean cloth and check that no visible residue remains.

Step 5: Clean the Inside of the Door

The inner door, edges and detergent dispenser can also develop a film of grease or detergent residue.

Use a damp cloth to wipe the inside of the door and the surrounding edges. If the detergent dispenser has visible deposits, clean it according to the manufacturer’s instructions.

Pay attention to the area around the hinges, but do not pour water into electrical or mechanical openings. The goal is to clean accessible surfaces without allowing water to enter parts that are not designed to get wet.

If you notice unusual staining or damage, consult the manual before using a stronger cleaning product.

Step 6: Clean the Dishwasher Interior

Once the filter, spray arms and door seal are clean, look over the interior walls and bottom of the tub.

Wipe away visible residue using a soft cloth. If the machine has a self-cleaning or machine-care programme, check the manual to see how it should be used.

For a deeper clean, choose a dishwasher cleaner that is suitable for your model and follow the product label. Some machines have specific cleaning cycles, while others may require a different approach.

Do not assume that every dishwasher should be cleaned with vinegar or baking soda. These are common home-cleaning suggestions, but they are not universally recommended for every model. Follow the manufacturer’s guidance to avoid damaging components or finishes.

You can also read the American Cleaning Institute’s overview of how dishwashers work for general background on dishwasher cleaning and use.

Step 7: Wipe the Exterior

The outside of the dishwasher needs attention too, particularly the handle, buttons and areas that are touched frequently.

Use a soft cloth and a cleaner suitable for the appliance’s finish. For stainless steel, follow the manufacturer’s care instructions to avoid scratches or streaks.

Do not spray liquid directly into the control panel, buttons or display. Apply the cleaner to the cloth first, unless the product instructions say otherwise.

Finish by wiping away any remaining moisture.

Step 8: Let the Dishwasher Dry

After cleaning, check that the filter and any removable parts are properly back in place. If your cleaning method requires an empty wash cycle, run the recommended programme according to the manual and the cleaner’s instructions.

When the cycle is finished, allow the interior to air out if practical. Leaving the door slightly open can help moisture escape, provided it is safe to do so and the appliance is not within reach of children or pets. Your dishwasher is now ready for its next load.

4. How Often Should You Clean a Dishwasher?

There is no single schedule that works for every household. How often you need to clean your dishwasher depends on how frequently you use it, what you wash and the guidance in your user manual.

The following is a practical starting point, not a fixed requirement for every model.

Dishwasher part or task	Suggested frequency
Remove visible food scraps	Whenever you notice them
Check and clean the filter	About once a week, or as needed
Wipe the door seal	Weekly or when residue appears
Inspect the spray arms	Monthly or when cleaning performance drops
Clean the interior with an approved method	As recommended in the manual, or when residue builds up
Wipe the exterior and controls	As needed
Check the manual for maintenance requirements	When you first install the machine and whenever a problem occurs

If you run your dishwasher several times a day, you may need to inspect the filter more frequently. If you use it only occasionally, you might not need to clean every component as often.

The important thing is to check for visible residue and follow the maintenance schedule recommended for your appliance.

5. Common Dishwasher Cleaning Mistakes

Cleaning your dishwasher should not be complicated, but a few common mistakes can make the job harder or damage parts of the machine.

6. Common Dishwasher Problems and What to Check

If your dishwasher still does not perform as expected after cleaning, use the table below to identify what to check next.

Problem	What you can check
Unpleasant smell	Look for food residue in the filter, around the door seal and in accessible areas of the tub.
Food left on dishes	Check the filter, spray-arm openings, detergent instructions and how the dishes are loaded.
Water remaining at the bottom	Check the manual for permitted drain-filter maintenance and look for visible obstructions. If the water remains, seek model-specific support.
White marks on glasses or dishes	Check detergent and rinse-aid settings, water hardness and the manufacturer’s guidance. The cause can vary.
Water leaking around the door	Check for visible debris around the seal and ensure racks or dishes are not preventing the door from closing. Persistent leaks need further inspection.

For more help with poor cleaning results, consult Bosch India’s dishwasher troubleshooting guide. If your appliance is from another brand, use that manufacturer’s support resources instead.

Do not dismantle electrical or plumbing components unless the manufacturer specifically identifies the task as suitable for the user. If you suspect a fault, switch off the appliance and contact an authorised service professional where appropriate.

7. Frequently Asked Questions

8. Final Thoughts

Knowing how to clean a dishwasher can save you from dealing with avoidable smells, residue and some common cleaning issues. You do not need to scrub every part after every wash. Start with the filter, keep the door seal clean, inspect the spray arms and give the interior a deeper clean when needed.

The best routine is one you can follow consistently. Check the filter regularly, remove visible food scraps and follow the care instructions for your specific model.

If the dishwasher continues to smell, leak or leave dishes dirty after basic maintenance, look beyond cleaning and consult the manufacturer’s troubleshooting guidance. A little routine care can help you keep the appliance in good condition, while proper diagnosis can help prevent a small issue from becoming a bigger one.