Descaling a kettle
Difficulty: Easy · Time: approx. 15 minutes
Limescale in a kettle is normal – the harder your tap water, the faster the white layer builds up. It isn't dangerous, but it wastes energy and clouds the water.
You don't need expensive special products: citric acid or vinegar dissolve the limescale reliably. The only important thing is rinsing thoroughly so no taste remains.
What you'll need
- Citric acid (powder) or household vinegar
- Water
- Sponge or cloth
- Optional: an old toothbrush for corners
Step by step
- 1
Make the solution
Fill the kettle about halfway with water and add 1–2 tablespoons of citric acid (or the same amount of vinegar).
- 2
Boil and let it work
Bring the solution to the boil once, then let it sit for 15–30 minutes. The limescale visibly dissolves.
- 3
Pour out and rinse
Pour the solution away and rinse the kettle thoroughly 2–3 times with clean water.
- 4
Remove residue
Wipe off stubborn residue with a sponge or toothbrush. To be safe, boil one batch of clean water and pour it away before making tea again.
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Upload a photo →Frequently asked questions
- Citric acid or vinegar?
- Both dissolve limescale. Citric acid smells more neutral and is gentler on appliances with seals; vinegar is cheaper. Rinse thoroughly after either.
- How often should I descale?
- Depending on water hardness, every 1–4 weeks. When a noticeable layer forms at the bottom or the water takes longer to boil, it's time.