How to Clean Tea Stains from Cups and Mugs (5 Methods That Work)

Learning how to clean tea stains from cups takes about five minutes and one cheap ingredient: bicarbonate of soda. The brown ring is mostly tannin from the tea, bound up with minerals from your water. Below are five methods, from a quick daily rinse to an overnight soak, plus what to avoid on bone china, gold rims and travel mugs.

Why do tea stains stick to cups?

Tea stains stick because tannins in the tea bond to tiny pits in the glaze, and minerals in hard water help them build into a film. Every cup adds a thin layer. After a few weeks of quick rinses, that layer turns into the dark ring you can see at the waterline.

Water hardness makes a real difference in Dublin. South Dublin County Council reports that water leaving the Leixlip plant measures 150-300 mg/l of calcium carbonate. Water from Ballymore Eustace measures about 50 mg/l. Our guide to hard water in Dublin explains which areas get which supply.

Stained mugs rarely come alone. The same scale usually sits on the kettle, the taps and the shower screen. If the whole kitchen needs that level of attention, a deep cleaning service covers limescale on taps, sinks and appliance fronts in one visit.

How to clean tea stains from cups with bicarbonate of soda

Bicarbonate of soda is a mild alkaline powder that loosens tannin without scratching most glazes. It works on ceramic, stoneware, porcelain and glass. This is the method to try first.

1. Rinse the cup with warm water and leave it wet.
2. Sprinkle in one teaspoon of bicarbonate of soda.
3. Add a few drops of water to make a thick paste.
4. Rub the stain with a soft sponge or cloth in small circles for one to two minutes.
5. Rinse well, then wash in hot soapy water as normal.
6. Repeat once for heavier rings, letting the paste sit for 10 minutes first.

A fresh ring usually lifts on the first go. If a faint shadow remains, move on to a soak rather than rubbing harder.

What materials do you need?

Most of what you need is already in an Irish kitchen press. The table shows which method suits which stain.

How do I get rid of tea stains in cups that will not shift?

Old stains need time rather than force, so soak them. Sophie Allport makes bone china and stoneware mugs. It recommends a 30 minute soak in warm water with a gentle washing up liquid as the first step. If that fails, step up to an overnight soak.

For an overnight soak, fill the mug with hot water and drop in one denture cleaning tablet. These tablets release oxygen that bleaches tannin gently. Leave it until morning, then wash and rinse well.

If the ring has a chalky white edge, limescale is part of the problem. Fill the mug with equal parts hot water and white vinegar and leave it for an hour. Do not add bicarbonate at the same time. The two react, fizz and largely cancel each other out.

How to remove tea stains from mugs without damaging the glaze

Treat good mugs gently, because a scratched glaze stains faster next time. Use soft sponges only, never scouring pads, steel wool or abrasive powders. Sophie Allport also advises against scouring pads and abrasive detergents on its mugs.

Bone china needs extra care in the dishwasher. Sophie Allport advises a gentle, short or china cycle at no more than 40°C, with pieces not touching. Mugs with gold or silver rims are best washed by hand, because dishwasher tablets can dull the metal.

Crazed mugs, where the glaze shows fine cracks, hold stains deep in the cracks. Bicarbonate and soaks still help, but a crazed mug will never look new again. Older crazed mugs are better used for pens than for tea.

How to remove tea stains from cups made of plastic, steel or glass

Different materials need small changes to the method. The bicarbonate paste works on almost everything, but scrubbing tools must match the surface.

• Stainless steel travel mugs and flasks: use a denture tablet soak overnight and a bottle brush. Steel wool leaves scratches that hold more stain.
• Plastic and bamboo cups: soak in warm soapy water with a teaspoon of bicarbonate. Plastic absorbs colour, so old stains may only fade.
• Glass cups and teapots: vinegar works well on glass because the film is often mostly scale.
• Ceramic teapots: fill with hot water and two teaspoons of bicarbonate, leave for a few hours, then brush the spout.

Coffee stains respond to the same methods as tea. Coffee rings are often oilier, so a soak with washing up liquid first helps.

Mistakes to avoid when cleaning stained cups

Most damage to mugs comes from using too much force or mixing products. These are the mistakes that do the most harm.

• Mixing cleaners. The Health and Safety Authority’s home chemicals leaflet says do not mix chemicals. Never combine bleach with vinegar or other cleaners.
• Reaching for bleach first. It is rarely needed for tea. If you use it, dilute it, use it alone and rinse many times.
• Scouring pads and cream cleaners. They scratch glaze and wear off printed designs.
• Rubbing salt on metal rims. Salt scratches gold and silver lustre.
• Leaving tea to dry in the cup. A dried ring is far harder to shift than a wet one.

Pans suffer the same way. Our post on how to clean a burnt saucepan covers gentle soak methods for metal.

How do you get rid of tea stains in cups for good?

You stop tea stains coming back by rinsing cups straight after use and washing them properly once a day. A quick rinse stops the tannin film drying onto the glaze. A proper wash in hot soapy water removes what the rinse leaves.

In hard water areas, filtered water in the kettle cuts down on the mineral film. Topping up dishwasher salt and rinse aid also helps the machine leave less scale on cups. Descale the kettle every few weeks, because scale flakes end up in every cup you pour.

A monthly bicarbonate rub on your most-used mugs keeps them looking newer for longer. If the rest of the kitchen has the same brown and white build-up, we can deep clean it as part of a booking. Get a quick estimate from the cleaning cost calculator or call us on 01 230 8646.