Citric Acid in the Washing Machine: A Tip for Hard Water

In areas where the water is classed as hard, an excess of minerals can make clothes feel rougher, encourage residue build-up in the washing machine and lower the effectiveness of detergent. A common household cleaning ingredient-citric acid-has been highlighted as an option that can help reduce these effects when used correctly. As well as helping to tackle limescale deposits, it can support washing machine upkeep and contribute to a more efficient wash.

How does citric acid help to soften hard water?

Hard water contains higher levels of calcium and magnesium. These minerals can settle on fabric fibres and also accumulate inside the washing machine. Citric acid reacts with them, helping to limit scale formation and allowing the detergent to work better during the wash.

While it is not a replacement for a proper water-treatment system, citric acid can be used from time to time to reduce limescale build-up in the washer-particularly in places where water hardness is high.

How to use citric acid in a washing machine

Citric acid can be used both for cleaning the machine and as an aid in certain washes, provided you follow the appliance manufacturer’s guidance and avoid overuse.

For routine washer maintenance, it is typically dissolved in water and run through an empty cycle so the solution circulates through the drum and internal components.

• Use citric acid intended for household use
• Dissolve the product as directed on the packaging
• Run a cleaning cycle with the machine empty
• Avoid using larger amounts than recommended
• Check your washing machine manual before applying it
• Repeat the cleaning only when needed

What benefits can this habit bring?

Regular maintenance can help cut down on mineral residue, support the machine’s operation and contribute to a more effective wash. In hard-water areas, it may also reduce marks on clothing caused by limescale deposits.

However, specialists note that citric acid does not replace dedicated laundry products and will not solve every issue linked to water hardness. It should be treated as a supplement to washing machine maintenance rather than a complete solution.

• Helps reduce limescale build-up
• Supports detergent performance
• May help clothes feel softer
• Assists with cleaning the machine drum
• Reduces internal mineral residue
• Complements preventative washing machine maintenance

What precautions matter before trying this tip?

Before putting any product into your washing machine, it is sensible to check the manufacturer’s manual for specific advice on cleaning and descaling. Some models already include dedicated maintenance programmes.

It is also essential never to mix citric acid with bleach or other incompatible chemicals, as this can trigger unwanted reactions. Use only the recommended amount and store the product in a dry place.

Do simple maintenance to extend the washing machine’s lifespan

If your local water contains a lot of minerals, occasional cleaning with citric acid can help limit limescale build-up and support the machine’s performance over time.

By combining this step with regular cleaning of the filter, detergent drawer and door seals, you help keep the washer in good condition and maintain the quality of your washes.