If you’re looking for a simple, natural way to clean your home, citric acid is one of the most effective ingredients you can use.
It’s affordable, biodegradable, and incredibly good at tackling limescale, hard water stains, and mineral build-up—without harsh chemicals.
In this guide, you’ll learn:
- What citric acid is and why it works
- 5 powerful ways to clean with it
- When NOT to use it
- How to use it safely and effectively
What Is Citric Acid (And Why Is It So Good for Cleaning)?
Citric acid – (C₆H ₈O₇) pH 2 – is a great addition to your list of natural cleaning ingredients as it’s low pH means it is very acidic which means it’s very good for removing things like calcium (limescale), rust, and other minerals. It’s also useful for killing mould and mildew and can be used as a preservative.
Citric Acid is a natural acid compound which is naturally found in many citrus fruits and up until around 1920 citric acid was made from these fruits. However, since then almost 90% of citric acid is now produced by mould-based fermentation (e.g., Penicillium or Aspergillus Niger) of sugars
As soon as you mention the word mould it starts raising alarm bells. However, when producing citric acid commercially the mould is carefully filtered out of the final product, leaving it safe to consume and use around the house. If you want to read more about the safety of Citric Acid check out What is Citric Acid? and Is It Safe For You?
As a cleaner, it works by:
- Breaking down mineral deposits
- Dissolving limescale
- Softening hard water
This makes it especially effective in bathrooms and kitchens where limescale builds up quickly.
It’s widely used in cleaning products because it binds to minerals and lifts them away from surfaces
5 Ways to Use Citric Acid for Cleaning
Here are 5 of my favourite uses for using Citric Acid to clean around the home :
Descaling Your Kettle
Citric acid is great for removing limescale which makes it perfect for descaling your kettle, here’s how:
What You’ll Need:
- 2 to 3 tablespoons of citric acid
How To:
- Half fill kettle and bring to the boil
- Switch off and unplug the kettle
- Carefully add the citric acid to the kettle
- Leave to dissolve and fizz
- Swish the solution around the kettle and pour a little out so it gets into the spout
- Leave for 15 to 20 minutes
- Empty, rinse and refill
To save water you can pour the citric acid solution down the loo to help remove limescale build up in the loo.
General Cleaning Spray
Citric acid makes a great alternative to using vinegar in a general cleaning spray, especially if you’re not keen on the smell of vinegar. It’s great for removing soap scum and water marks on glass shower doors
What You’ll Need:
- 500ml hot water (boiled and slightly cooled)
- 3 tablespoons Citric Acid
- Few drops of essential oil – optional
- Glass measuring jug
- Glass spray bottle
How To:
- Pour the hot water (slightly cooled boiled water) into the measuring jug
- Add the citric acid and stir to dissolve
- Add the essential oils if using
- Pour the solution into the spray bottle.
You’re now ready to tackle all those cleaning jobs. It’s especially good for cleaning windows and shower screens and removing soap scum.
Clean Your Toilet Naturally
Once a week; if you don’t have hard water this can be less often, just as and when required; give your loo a clean with Citric Acid to remove the mineral / limescale deposits.
This is super easy and you will be amazed at the results.
- Pour a jug of hot water into the toilet bowl and tip in one to two cups of Citric Acid, sprinkling a lit bit around the bowl as well
- To tackle stains under the rim you can make up a citric acid spray with 50g citric acid dissolved in 250ml of warm water. Just spray under the rim after you’ve put the Citric Acid in the toilet and bowl.
- Leave for at least an hour, overnight if possible.
- When you’re ready just give the toilet bowl a good scrub with a brush and flush.
Note: if you’re tacking a build up of limescale for the first time you may need to repeat this process.
Clean your washing machine
To ensure your washing machine stays clean and gunk free you should do this once a month.
What You’ll Need:
- 1 cup (approx. 250g) citric acid
How To:
- Clean the detergent draw and rubber seals with distilled white vinegar or a citric acid solution
- Pour the citric acid into the washing machine drum
- Run the machine on a hot wash
That’s it !
Keeping Your Shower Head Clean
Have you ever noticed how the holes in your shower head get clogged up. These can easily be cleaned by soaking your shower head in a solution of hot water and citric acid. Leave for around 10 minutes and then rinse
Quick Guide: When to Use Citric Acid
| Cleaning Job | Use Citric Acid? |
|---|
| Limescale | ✅ Yes |
| Hard water stains | ✅ Yes |
| Grease | ❌ No |
| Disinfecting | ⚠️ Limited |
It works best on mineral build-up—not grease.
When NOT to Use Citric Acid
Citric acid is powerful—but not for everything.
Avoid using it on:
- Natural stone (marble, granite)
- Wood surfaces
- Delicate finishes
It can dull or damage these surfaces over time
Is Citric Acid Safe for Cleaning?
Yes—when used properly.
It’s:
- Non-toxic and biodegradable
- Safer than many chemical cleaners
- Widely used in household products
Just avoid contact with eyes and use gloves if you have sensitive skin.
My Go-To Natural Cleaning Setup
To keep things simple, I use:
- Citric acid (for descaling)
- Bicarbonate of soda (for grease)
- Vinegar (for general cleaning)
Between these three, you can clean almost everything in your home.
FAQs
What does citric acid clean best?
It works best on limescale, mineral deposits, and hard water stains.
Is citric acid better than vinegar?
It’s often more effective for descaling and has less smell.
Can you mix citric acid with baking soda?
It will fizz, but reduces effectiveness—use them separately.
How strong should a citric acid solution be?
A 5–10% solution works well for most cleaning jobs.
Final Thoughts
Citric acid is one of the simplest ways to switch to natural cleaning.
Once you understand where it works best:
You can clean your home effectively with fewer products and less waste
