Remove Bathroom Limescale with Baking Soda, Washing-up Liquid and Toothpaste

In France, white marks quickly reappear on taps and surfaces in rooms exposed to water and humidity every day.

Published on 21 June 2025, the source article, whose media outlet is not identified in the material provided, suggests a homemade paste made with baking soda, washing-up liquid and toothpaste for cleaning the bathroom. This approach targets visible deposits on surfaces, soap residue and marks left by water.

A homemade paste for marked areas

Limescale is made up of mineral deposits found in water. When a droplet dries on a tap, shower screen or tiled surface, it can leave behind a whitish film. This becomes harder to remove when water repeatedly runs over the area without being dried afterwards.

The recipe described by the source uses three everyday products. Baking soda gives the mixture a mildly abrasive texture. Washing-up liquid helps lift grease and leftover soap, while toothpaste is included for its paste-like consistency and gentle polishing action.

“The proposed mixture does not replace regular maintenance: it mainly works on established marks and built-up residue.”

The source advises making the paste in a clean bowl using four tablespoons of baking soda, three tablespoons of washing-up liquid and two tablespoons of toothpaste. It should have a creamy texture so that it stays in place on the areas being scrubbed.

• Four tablespoons of baking soda;
• Three tablespoons of washing-up liquid;
• Two tablespoons of toothpaste;
• A little water, only if the mixture seems too thick.

How to use it without damaging surfaces

Use a soft sponge or microfibre cloth to spread the preparation over shower screens, the basin, taps or grout. Apply it in circular motions without pressing too hard. Corners, handles and the base of taps are often where deposits build up most.

The source recommends leaving the paste to sit for between five and ten minutes. An old toothbrush can be used in narrow spaces, particularly around a tap or in certain grout lines. Once the area has been gently scrubbed, rinse it with lukewarm water and dry it thoroughly with a clean cloth.

“Rinsing and drying are an integral part of cleaning: paste left on a surface can itself leave marks.”

Before applying it to a large area, it is best to test it on an inconspicuous spot. Not all taps, screens and finishes react in the same way to abrasive products. Marble, natural stone, some glossy plastics and certain delicate finishes require particular care.

Precautions to bear in mind

Baking soda and toothpaste can create a scrubbing effect. Although this may help with a stubborn mark, it can also dull a sensitive surface if applied too vigorously or repeatedly. A soft cloth is preferable to an abrasive sponge.

It is also important not to mix household cleaning products without knowing whether they are compatible. Bleach, in particular, must not be combined with other cleaners. The source recipe does not include it, so the surface should be cleaned and rinsed before any other product is applied.

Why marks return despite cleaning

A bathroom brings together several contributing factors: water splashes, steam, soap, cosmetic products and poor ventilation. The white deposit is not always caused by limescale alone. Shower gel, shampoo or soap residue can form a dull layer on glass and taps.

Drying has a practical role. A shower screen that has been rinsed but left damp retains minerals from the water as it dries. Quickly using a squeegee or microfibre cloth after showering helps limit this effect. This routine also reduces marks on mirrors and chrome fittings.

• Ventilate the room after a shower or bath;
• Remove water from surfaces before it dries;
• Wipe taps and the edge of the basin;
• Clean areas where water collects on a regular basis;
• Rinse products applied to surfaces.

What to know in France

In France, water hardness differs from one area to another. So-called hard water contains more calcium and magnesium, encouraging deposits to appear on bathroom fittings. As a result, people do not all experience white marks with the same frequency, even when their cleaning routines are identical.

To check the quality of water supplied in a local authority area, public channels provide health information on drinking water. This can help explain the presence of minerals in mains water, without automatically meaning that it is unfit for consumption.

Where build-up persists, regularly descaling tap aerators, shower heads and water-runoff areas may be helpful. An aerator is the small fitting at the end of a tap: it generally mixes water with air and can collect particles or limescale over time.

Regular maintenance rather than a permanent solution

The source headline refers to removing limescale for good. In practice, no one-off cleaning method can permanently prevent new deposits if water continues to dry on the same surfaces. The method may help restore an affected area, while daily maintenance limits the return of marks.

White vinegar, mentioned in the source article as an option when marks are not very visible, is still an acidic product. It is not suitable for every material, especially some natural stones. Checking the manufacturer’s recommendations for the shower, basin or taps helps prevent damage to an expensive finish.

A straightforward routine of rinsing, ventilating and drying reduces the effort required for a deeper clean. The baking soda, washing-up liquid and toothpaste paste can then remain an occasional solution for areas that have lost their shine.