Best Way to Clean a Dishwasher

Why Your Dishwasher Needs Regular Cleaning

It might seem counterintuitive to clean an appliance designed to clean, but your dishwasher works hard and can accumulate food debris, grease, soap scum, and hard water mineral deposits. Over time, this buildup can lead to unpleasant odours, reduced cleaning efficiency, and even damage to the machine itself. Neglecting maintenance means your dishes might not come out as clean as they should, and the appliance's lifespan could be shortened. Understanding the best way to clean your dishwasher ensures it operates optimally and hygienically.

The internal components, particularly the filter, spray arms, and door seals, are prime locations for trapped food particles and bacteria to thrive. When these areas become clogged or soiled, water and detergent can’t circulate effectively, leading to issues like your dishwasher not cleaning dishes properly. A thorough clean isn't just about aesthetics; it's about restoring functionality and preventing common problems such as a dishwasher not cleaning well.

Regular cleaning also addresses a common complaint: why does my dishwasher smell? This odour is usually a sign that food particles are festering in the filter or drainage system. By adopting a consistent cleaning routine, you can preemptively tackle these issues, ensuring your kitchen remains a pleasant environment.

A clean dishwasher performs better and lasts longer.

Preparing for the Clean: What You'll Need

Before you begin the process of cleaning your dishwasher, gathering the correct supplies will make the task smoother and more effective. You won't need specialist tools, but having the right household items on hand is key. The most common and effective cleaning agents involve simple, readily available products that tackle grease, limescale, and bacteria without harming your appliance.

You will typically need:

• White vinegar: An excellent natural disinfectant and limescale remover.
• Baking soda: A mild abrasive that helps deodorise and scrub away grime.
• A dishwasher cleaner product (optional): Many brands offer specific dishwasher cleaner solutions designed for deep cleaning.
• A soft cloth or sponge: For wiping down accessible surfaces.
• A small brush or old toothbrush: Ideal for scrubbing tight spots like the filter housing and spray arm holes.
• A bowl or cup: To hold cleaning solutions during the wash cycle.
• Gloves: To protect your hands, especially if using stronger cleaning agents.

Always refer to your dishwasher's manual before using any cleaning product or method to ensure compatibility and avoid voiding your warranty. Some manufacturers may advise against certain substances or procedures.

Always unplug your dishwasher or turn off the power at the breaker before attempting to remove and clean the filter, especially if you are unsure about the internal components.

Step-by-Step: The Best Way to Clean Your Dishwasher

Implementing a regular cleaning schedule is the most effective way to maintain your dishwasher. This routine can be divided into weekly checks, monthly deep cleans, and addressing specific issues like a dishwasher not cleaning properly.

→ Dishwasher Cleaner: When and How to Use It

Monthly Deep Clean Procedure:

1. Empty the Dishwasher: Ensure the dishwasher is completely empty of dishes, cutlery, and any racks or loose items.
2. Clean the Filter: This is arguably the most critical step for preventing a dishwasher not cleaning well. Locate the filter, usually at the bottom of the tub. It might be a cylindrical component that twists out, or a mesh screen. Rinse it thoroughly under hot running water to remove trapped food particles. Use a soft brush to dislodge stubborn debris. If the filter is heavily soiled, soak it briefly in warm, soapy water or a vinegar solution. Ensure it is properly reinserted before running the machine.
3. Inspect and Clean Spray Arms: Check the holes in the spray arms for blockages caused by limescale or food debris. Use a toothpick or a thin needle to carefully clear any obstructions. You can often remove the spray arms entirely for easier cleaning; consult your manual for instructions.
4. Clean the Door Seals and Edges: Wipe down the rubber seals around the door with a damp cloth. Pay attention to the bottom edge of the door where grime can accumulate. A mild soap solution or a vinegar-dampened cloth works well.
5. Run a Vinegar Cycle: Place a dishwasher-safe bowl or cup containing 1-2 cups of white vinegar on the top rack of the empty dishwasher. Run the machine on a hot water cycle. The vinegar will help to break down grease, soap scum, and limescale throughout the interior.
6. Run a Baking Soda Cycle: After the vinegar cycle is complete, sprinkle about a cup of baking soda across the bottom of the dishwasher. Run a short, hot water cycle. Baking soda is excellent for deodorising and removing any lingering stains or odours, leaving the interior fresh.
7. Final Wipe-Down: Once the cycles are finished, wipe down the interior with a clean, damp cloth to remove any residue.

This comprehensive approach addresses the common reasons for a dishwasher not cleaning dishes properly and helps prevent issues like a dishwasher smell.

Troubleshooting Common Dishwasher Cleaning Problems

Even with regular cleaning, you might encounter specific issues. Understanding how to address these can save you from unnecessary service calls or premature appliance replacement. Many problems stem from simple maintenance oversights.

Dishwasher Not Cleaning Properly / Dishwasher Not Cleaning Well:

• Cause: Clogged filter, blocked spray arms, hard water deposits, using the wrong detergent, overloading the machine, or a worn-out seal.
• Remedy: Perform the deep clean procedure outlined above, paying close attention to the filter and spray arms. Ensure you are using high-quality detergent and not overloading. For hard water issues, consider using a rinse aid or a specific dishwasher cleaner designed to tackle limescale. If the problem persists after cleaning, check the door seal for damage.

Dishwasher Not Cleaning Dishes:

• Cause: Similar to the above, but can also be due to a faulty water inlet valve, a failing pump, or issues with the heating element.
• Remedy: Start with thorough cleaning. If the water isn't heating adequately (dishes feel cold after a cycle), or if the machine isn't filling with enough water, it might indicate a more serious mechanical issue that requires professional assessment.

Why Does My Dishwasher Smell?

• Cause: Accumulated food debris in the filter or pump, mould or mildew growth in damp areas (like seals), or stagnant water in the trap.
• Remedy: The monthly deep clean, especially the filter cleaning and vinegar/baking soda cycles, is usually sufficient. Ensure the dishwasher door is left slightly ajar after a cycle to allow air circulation and prevent musty odours. For persistent smells, a dedicated dishwasher cleaner might be more effective.

Addressing Limescale Build-up:

• Cause: Hard water minerals depositing on internal components and spray arms.
• Remedy: Regular use of white vinegar or a commercial limescale remover will help prevent and break down these deposits. Using a dishwasher cleaner specifically formulated for hard water can also be beneficial.

When troubleshooting, always start with the simplest solutions – usually related to cleaning and maintenance. If the issue is mechanical, seeking professional help is advisable.

Using Specific Cleaners: Vinegar vs. Commercial Products

When seeking the best way to clean dishwasher interiors, two primary approaches emerge: using common household items like white vinegar and baking soda, or opting for commercially produced dishwasher cleaner products. Both have their merits, and the choice often depends on the severity of the issue and personal preference.

→ DIY Dishwasher Cleaner: Natural Solutions for a Fresh Machine

White Vinegar: The Natural All-Rounder

White vinegar is a fantastic, affordable, and eco-friendly option for routine cleaning and tackling moderate limescale. Its acidic nature effectively breaks down grease, soap scum, and mineral deposits. As detailed in the monthly clean, running a cycle with vinegar is a proven method to refresh the interior and combat mild odours. For more stubborn limescale, you might need to repeat the vinegar cycle or use a stronger concentration, but always ensure adequate ventilation.

Baking Soda: The Deodoriser and Gentle Scrubber

Baking soda complements vinegar brilliantly. Its alkaline properties help neutralise acidic odours, making it an excellent deodoriser. When sprinkled on the bottom of the dishwasher and run through a hot cycle, it can help lift stains and leave the interior smelling fresh. It also acts as a mild abrasive, aiding in scrubbing away grime without scratching surfaces.

Commercial Dishwasher Cleaners: For Tough Jobs

If your dishwasher is suffering from significant build-up, persistent odours, or is no longer cleaning dishes effectively despite routine maintenance, a dedicated commercial dishwasher cleaner might be necessary. These products are formulated with stronger agents designed to tackle heavy grease, deep-seated limescale, and stubborn odours. They often come in convenient forms like pods or liquids and usually require a single, dedicated cycle. Always follow the manufacturer's instructions precisely when using commercial cleaners.

When selecting a commercial dishwasher cleaner, check labels for specific benefits, such as limescale removal, grease cutting, or odour elimination. Brands like Finish are well-known for offering such solutions, providing a targeted approach to appliance maintenance. However, for most regular cleaning needs, a combination of vinegar and baking soda is remarkably effective.

Preventative Maintenance: Keeping Your Dishwasher Sparkling

The most effective strategy for a consistently clean dishwasher and spotless dishes is preventative maintenance. By incorporating small habits into your routine, you can significantly reduce the frequency and intensity of deep cleans required.

Rinse Dishes Before Loading: While modern dishwashers are designed to handle food residue, it’s beneficial to scrape off large food particles before loading. This prevents excessive build-up in the filter and pump. A quick rinse isn't usually necessary unless dealing with particularly sticky or large remnants.

→ Clean Dishwasher with Baking Soda: A Deep Dive

Scrape, Don't Rinse: Modern dishwashers and detergents work best when they have some food particles to latch onto. Scraping off large chunks is sufficient for most situations.

Use Adequate Detergent: Ensure you are using the correct type and amount of dishwasher detergent. Using too little can result in poor cleaning, while too much can lead to excessive suds and residue. High-quality detergents often perform better at breaking down grease and food.

Check the Filter Regularly: Aim to check and rinse the dishwasher filter at least once a week, or more frequently if you notice issues with cleaning performance. This simple act can prevent many common problems.

Run Hot Cycles: Regularly running your dishwasher on a hot water cycle helps to break down grease and kill bacteria more effectively than cooler cycles. If your machine has a 'sanitize' option, use it periodically.

Leave the Door Ajar: After a cycle finishes, leave the dishwasher door slightly ajar. This allows moisture to escape, promoting air circulation and preventing the build-up of mould and mildew, which can cause odours.

Address Limescale Promptly: If you live in a hard water area, consider using a rinse aid designed to combat limescale or running a vinegar cycle more frequently, perhaps monthly, to prevent build-up.

A clean dishwasher starts with how you use it day-to-day.

When to Call a Professional

While most dishwasher cleaning and maintenance can be handled with household products and a bit of elbow grease, there are times when professional intervention is necessary. If you've followed all cleaning and maintenance steps and are still experiencing significant issues, it might be time to consult a qualified appliance repair technician.

Signs You Might Need Professional Help:

• Persistent Leaks: If your dishwasher is consistently leaking water onto the floor, even after checking door seals and ensuring it's level, there could be an internal plumbing issue or a crack in a component.
• Electrical Problems: If the dishwasher fails to power on, the control panel is unresponsive, or you notice burning smells, these are serious electrical issues that require expert attention for safety reasons.
• Unusual Noises: Grinding, loud banging, or persistent whining sounds that don't resolve after cleaning spray arms and checking for obstructions can indicate a problem with the motor, pump, or bearings.
• Water Not Draining: While a clogged filter is common, if the water still won't drain after cleaning the filter and checking for blockages in the drain hose, the issue might be with the drain pump or the connection to your household plumbing.
• Dishwasher Not Heating Water: If dishes are coming out of the wash cycle still dirty and cool to the touch, the heating element or its thermostat may have failed, requiring replacement.
• Error Codes: Modern dishwashers often display error codes. If you consult your manual and cannot resolve the issue indicated by the code, a technician will have the diagnostic tools to interpret and fix it.

Attempting to repair complex mechanical or electrical faults without the proper knowledge and tools can be dangerous and may cause further damage. For these issues, seeking the expertise of a professional is the safest and most efficient solution.