Limescale — the chalky white buildup inside a tea kettle — is just hardened minerals from your tap water. It's harmless but slows heating and flakes into your tea. Cleaning it out takes one acid soak and almost no scrubbing. Here's the method, plus how to keep it from coming back.
Step-by-step
Empty the kettle and check for limescale
Pour out any water and look inside. The white, chalky, flaky buildup on the bottom and walls is limescale — hardened mineral deposits from your tap water. It's harmless but slows heating and flakes into your tea.
Fill with a descaling solution
Use one of three options: a capful of a universal descaler like Durgol, one to two tablespoons of food-grade citric acid, or a 1:1 mix of white vinegar and water. Fill the kettle about halfway so the solution covers the scale line.
Boil, then let it sit
Bring the solution to a boil, switch off the heat, and let it sit for 20-30 minutes. The acid dissolves the mineral scale while it soaks — no scrubbing required. For heavy buildup, repeat the soak.
Scrub lightly and rinse thoroughly
Tip out the solution. Wipe any loosened residue with a non-abrasive sponge (never steel wool on a kettle interior). Rinse two or three times with clean water to remove all taste of the descaler.
Boil one more batch of plain water and discard
Fill with fresh water, boil, and pour it out to clear any lingering descaler flavor before you make tea. Wipe the exterior with a damp cloth; for stainless, a little bar-keeper's polish restores shine.
Prevent buildup going forward
Empty the kettle after each use instead of leaving water sitting, and descale every 4-6 weeks in hard-water areas (every couple of months in soft-water areas). Using filtered water dramatically slows limescale.
Recommended Gear
The gear we'd reach for. Prices shown on Amazon at click-through.
Durgol Universal Descaler / Decalcifier
budget-friendly
A fast-acting universal descaler that dissolves limescale in minutes — the no-fuss way to clean a kettle.
Check Price on Amazon →
Milliard Citric Acid (Food Grade, 2 lb)
budget-friendly
The cheap DIY method — a spoonful of food-grade citric acid in boiling water strips limescale fast.
Check Price on Amazon →
Essential Values Descaler / Cleaner (2 lb)
everyday
A bulk descaler for kettles, distillers, and coffee makers — the stock-up pick for hard-water homes.
Check Price on Amazon →Frequently Asked Questions
How do I remove limescale from a tea kettle?
Fill it halfway with a 1:1 white vinegar and water mix (or a tablespoon of citric acid, or a capful of descaler), boil, and let it sit 20-30 minutes. The acid dissolves the scale; rinse well and boil one batch of plain water before using.
How often should I descale a tea kettle?
Every 4-6 weeks in hard-water areas, every couple of months in soft-water areas. Empty the kettle after each use and use filtered water to slow buildup.
Want to dig deeper? See our guides to Best Electric Kettle (2026), How to Descale a Coffee Maker, and Best French Press (2026).