How to Descale a Kettle
Toronto's tap water is moderately hard, which means every kettle used daily builds up calcium and magnesium deposits (limescale) on the interior walls and heating element within a few months. A scaled kettle takes longer to boil, uses more electricity, and can flake mineral particles into your tea or coffee. Descaling takes 10 minutes.
Method 1 — White Vinegar (Most Common)
- Fill the kettle to the halfway mark with equal parts white vinegar and cold water
- Boil the kettle
- Let the solution sit in the kettle for 20–30 minutes after boiling (up to 1 hour for heavy buildup)
- Pour out the solution and rinse the kettle 3–4 times with fresh water
- Boil a full kettle of plain fresh water once and discard — this removes any residual vinegar taste
The acetic acid dissolves calcium carbonate on contact. For stubborn buildup, repeat the process or let the solution soak overnight.
Method 2 — Citric Acid (Faster, No Vinegar Smell)
- Add 1–2 tablespoons of food-grade citric acid powder to a kettle filled with water (available at bulk food stores and some pharmacies for a few dollars)
- Boil the kettle
- Let sit 10–15 minutes
- Rinse 2–3 times with fresh water
Citric acid is slightly more effective than vinegar and leaves no smell. It's the active ingredient in commercial kettle descalers.
Commercial Descalers
Products like Durgol or Urnex Dezcal are available at kitchen stores and Canadian Tire. Follow the package directions. They work faster than DIY methods but cost more.
The Spout Filter
Many kettles have a removable mesh filter at the spout. Remove it and soak in white vinegar for 30 minutes, then rinse. Scale accumulates heavily on these filters and blocks them completely if neglected.
How Often
- Daily use with Toronto tap water: Descale every 4–6 weeks
- Using filtered or Brita water: Every 2–3 months
- Visual check: When you see white flakes or a chalky white coating inside, it's time regardless of schedule
Kitchen cleaning including appliances is part of every Maidless deep clean. Book at maidless.ca.