White Trainers: Clean Them With Baking Soda and Black Soap

Spring calls for lighter outfits – and white trainers.

It is less ideal when your favourite shoes emerge from the cupboard looking more grey than white.

In sheer frustration, many people put their trainers in the washing machine. They may look cleaner for a short while, but the consequences often show later: detached soles, yellowed edges and brittle materials. Yet a straightforward blend of two household products can make white trainers look genuinely fresh again – gently, affordably and without specialist cleaners.

Why the washing machine damages your white trainers

Heat, friction and moisture: disastrous for glue and stitching

A delicate wash cycle may sound safe, but it is not. Inside the drum, trainers are exposed to:

• heavy mechanical stress from continuous spinning
• prolonged exposure to moisture
• extra warmth generated by the washing programme

Together, heat and friction attack the adhesive that joins the sole to the upper. The glues soften and lose their grip, while stitching is strained in ways it was never designed to withstand. Although the shoes leave the drum looking clean, they will often not last nearly as long.

They look clean at first – then unsightly yellow edges appear

Appearance is another issue. Water penetrates deep into fabric or leather, and rather than simply rinsing dirt away, it can spread it around. As the trainers dry, yellowish tidemarks and stains commonly form, leaving white shoes looking dull and aged. Detergent residue trapped in the fibres can even attract fresh dirt more quickly. It is hard to believe until it happens to you.

Regularly putting white trainers in the washing machine saves time – but significantly shortens their lifespan.

The brilliant pairing: two household products for white trainers again

Sodium bicarbonate: mild abrasion with powerful brightening

Sodium bicarbonate, usually sold simply as “baking soda” or “bicarbonate of soda”, is the key ingredient in this method. Its fine crystals act as a very gentle abrasive. They lift dried-on dirt and deposits from rubber, fabric and synthetic leather without scratching the surface. At the same time, the powder visibly brightens yellowed areas, including sole edges and creased sections around the forefoot.

Black soap: removes grease while conditioning the material

Soft black soap in paste form completes the treatment. It is generally made from plant-based oils, such as olive or linseed oil. This traditional soap can:

• remove greasy marks from road dust or bicycle chains
• draw grass stains and street grime out of the material
• lightly replenish oils in leather and synthetic materials, helping them stay supple

This conditioning effect is particularly valuable for leather or synthetic-leather trainers, as it helps prevent the material from drying out and becoming brittle.

The “paste” for white trainers: how to make it

This mixture takes only moments to prepare and needs just two ingredients:

• 2 tablespoons sodium bicarbonate (bicarbonate of soda / baking soda)
• 1 tablespoon soft black soap

The right texture: toothpaste rather than liquid soap

Put both ingredients into a small bowl and mix them thoroughly. You are aiming for a thick, creamy paste, similar to firm shaving cream or dense toothpaste. If it becomes too runny, stir in a little more baking soda. If it is too crumbly, add a tiny amount of water or a touch more soap.

That thicker texture offers a clear benefit: it stays precisely where you apply it, does not run into the shoe and avoids soaking it unnecessarily.

Why a liquid mixture does not belong on your shoes

Too much water is generally the enemy of trainers, especially where they have:

• foam soles on the inside
• layered materials
• delicate types of leather

A thick paste works at the surface, exactly where the dirt and yellowing are found. The inside of the shoe remains largely dry. This greatly reduces the likelihood of distortion, adhesive damage and yellow drying marks.

How to apply the mixture correctly

Start with the problem areas: sole edges and creases

Before cleaning, remove the laces and brush away loose dust with a dry brush or cloth. Then focus on the details:

• Pick up a little paste with an old toothbrush or a soft nail brush.
• Work it over the sole edge in small circular motions, paying particular attention to yellowish areas.
• Do not overlook the forefoot creases and the tongue, as hidden dirt often collects there.

The more textured the shoe, the more carefully you should work the brush into grooves and stitching. Dirt often settles deep in the gaps of canvas or mesh trainers in particular.

Leave it to work for the best result

Do not wipe the shoes straight after brushing in the paste. Leave it on the material for around 15 minutes. During this time, the soap ingredients break down grease and road grime, while the baking soda brightens and neutralises odours. For heavily soiled soles, you can extend this to 20 minutes.

Leaving the mixture to work replaces harsh scrubbing: letting it do its job protects the material and stitching.

Wiping and drying properly: where most mistakes happen

Never hold them under a running tap

To remove the paste, lightly dampen a microfibre cloth and wring it out well. Wipe the trainers clean step by step. Rinse the cloth repeatedly as you work so that loosened dirt is not spread back over the shoes.

Avoid the following:

• holding the shoes directly under running water
• scrubbing with excessive pressure
• following up with aggressive multi-purpose cleaners

Keeping moisture under control prevents dirt from penetrating deeply again and protects sensitive glued sections.

Dry gently, away from heat sources

Choose a drying spot that is shaded, well ventilated and at room temperature. A hallway or bedroom is preferable; avoid a radiator and do not leave them on a balcony in direct sunlight. Intense heat can:

• harden the material and cause cracking
• warp the sole
• encourage yellow marks to return

To help the shoes retain their shape, loosely fill the interior with paper. Newspaper will work, though tissue paper is gentler; use kitchen roll only as a last resort because it tears easily.

How to keep your white trainers clean for longer

Waterproofing spray as an invisible protective barrier

Once the shoes are fully dry and white again, a waterproofing spray is worthwhile. It creates a thin layer over the material that repels water and dirt. This is especially useful in towns and cities, where splashback, dust and road grime are less able to stick.

Apply the spray evenly from a little distance, then allow it to absorb briefly. Textile trainers require different products from leather ones, so check the packaging.

A mini routine after every wear

Anyone who loves white trainers can make life easier by doing a quick check after wearing them:

• remove loose dust with a dry brush
• dab fresh marks with a damp cloth or a dirt eraser
• occasionally freshen sole edges with a little baking soda and water

This stops a thick layer of grime building up in the first place, so it does not need laborious removal later. The “paste treatment” with baking soda and black soap will then be needed less often, while its effects last longer.

More than appearance: why this method pays off twice

Looking after your trainers saves money over time. Every season in which a pair is rescued means one fewer new pair needs to be bought. High-quality models with thick soles, specialist cushioning or limited colour combinations can be worn for considerably longer this way.

There is an environmental benefit too. Trainers are made from mixed materials that are difficult to recycle. Each extra season reduces footwear waste – a small but practical contribution. Compared with expensive specialist cleaners, the simple baking soda and black soap mixture also creates less packaging waste and usually avoids harsh chemicals.

If you wear sensitive materials such as nubuck or suede, test the method on an inconspicuous area first and use the paste only on smooth sections and soles. For trainers made entirely from fabric or synthetic leather, however, it is an impressively effective rescue treatment: a few minutes of work, a little patience – and the white classics will look as though they deserve a fresh chance this spring.