For years, baking soda, known chemically as Sodium Bicarbonate, has been treated as a sort of all-purpose solution for household cleaning. It is inexpensive, widely available, and often presented as a safer alternative to stronger chemical products. In many London homes, it has become a staple not just in the kitchen cupboard but also under the sink.
There is a good reason for that reputation. Baking soda can neutralise odours, loosen grime, and assist with light cleaning tasks. Yet somewhere along the way, its capabilities have been overstated. Scroll through enough online guides, and you might come away with the impression that it can clean virtually anything.
That is where problems begin.
Used in the wrong context, baking soda can quietly cause damage, sometimes immediately visible, sometimes only noticeable months later. Professional cleaners see the results of these mistakes more often than one might expect: dulled finishes, scratched surfaces, and materials that have lost their original appearance far sooner than they should.
The issue is not that baking soda is ineffective. It is that it is often used without a proper understanding of how it interacts with different materials.
Wooden Furniture: Subtle Damage That Builds Over Time
Wood is one of the most forgiving materials in a home-until it isn’t. Many pieces of furniture are finished with a protective coating, whether varnish, lacquer, or oil. That layer is what gives wood its sheen and shields it from daily wear.
Baking soda, though soft between your fingers, has a slightly gritty texture. When rubbed onto finished wood, especially repeatedly, it acts a bit like very fine sandpaper. The effect is rarely dramatic after a single clean, which is why the risk is often overlooked. Instead, the damage builds gradually.
At first, the surface may appear slightly dull. Then the light stops reflecting evenly. Eventually, faint scratches become visible, particularly in natural daylight. Once the protective finish is compromised, the wood underneath is far more vulnerable to moisture and staining.
This is especially relevant in London homes where older or restored wooden furniture is common. Pieces with character-antique tables, polished armrests, and hardwood cabinets-are often the most susceptible.
A damp cloth and a suitable wood cleaner may not feel as satisfying as a “deep scrub”, but they preserve the integrity of the material far better in the long term.
Wooden Floors: When a Popular Cleaning Hack Goes Wrong
There is a widely shared cleaning tip that combines baking soda with vinegar to tackle dirt on wooden floors. On paper, it sounds effective: one ingredient cuts grease, the other neutralises odours. In practice, the chemistry is less helpful than it appears.
When baking soda and vinegar are mixed, they react and largely cancel each other out, producing water, carbon dioxide, and a small amount of residual salt. What remains is not a powerful cleaner, but the process still exposes the floor to both abrasion and acidity.
Wooden floors rely heavily on their protective seal. Once that layer begins to wear away, even slightly, moisture can seep into the wood. In a damp climate like London’s, that is not a minor concern. Over time, boards may swell, warp, or develop uneven colouring.
Many homeowners only realise something has gone wrong when sections of the floor start to look patchy or feel rough underfoot. By then, simple cleaning is no longer enough; restoration may be required.
It is a good example of how a well-intentioned shortcut can lead to more work, not less.
Silver and Soft Metals: The Difference Between Cleaning and Wearing Down
There is a long-standing method involving baking soda, hot water, and aluminium foil that can help remove tarnish from silver. Used correctly, it relies on a chemical reaction rather than abrasion, which is why it can be effective.
The confusion arises when that process is replaced with scrubbing.
Silver, gold, and similar metals are relatively soft. When baking soda is turned into a paste and rubbed onto these surfaces, it begins to wear them down. The scratches may be too fine to notice immediately, but they affect how light reflects off the surface.
Jewellery that once looked bright can begin to appear flat or cloudy. Decorative items lose their crisp detail. Over time, repeated abrasion can even soften engravings or intricate patterns.
It is not uncommon for people to assume tarnish has returned quickly, when in reality the surface has simply been altered.
A proper polishing cloth or a cleaner designed specifically for metals achieves a better result with far less risk.
Glass Surfaces: The Scratches You Don’t See Straight Away
Glass is often thought of as hard and resistant, which leads many people to assume it can withstand almost any cleaning method. While it is certainly more durable than some materials, it is not immune to abrasion.
Using baking soda on glass, whether windows, mirrors, or tabletops, can leave behind very fine scratches. Individually, they are almost invisible. Collectively, they begin to affect clarity.
In London, where windows are regularly marked by rain, it is understandable that homeowners want an efficient way to keep glass clean. The temptation to use a slightly abrasive cleaner for stubborn marks is strong. Unfortunately, that approach tends to create a different problem.
Over time, scratched glass develops a faint haze. It becomes harder to achieve that crisp, streak-free finish, no matter how often it is cleaned afterwards.
A simple glass cleaner paired with a microfibre cloth or squeegee may seem basic, but it avoids this gradual deterioration entirely.
Aluminium Cookware: A Reaction You Might Not Expect
In the kitchen, baking soda is often used to deal with burnt-on food. In many cases, it works well, particularly on more robust materials. Aluminium, however, reacts differently.
When baking soda sits on aluminium for too long, it can trigger oxidation. This process alters the surface of the metal, leading to discolouration. Pans may develop a dull, greyish tone or uneven patches that are difficult to remove.
While this does not necessarily make the cookware unsafe, it does affect both appearance and, in some cases, performance. Heat distribution can become less consistent if the surface is no longer uniform.
It is a subtle change, which is why people often continue using the same method without realising the cause.
A soak in warm, soapy water followed by gentle cleaning tends to achieve the same result without altering the material itself.
Marble Worktops: High-End Surfaces with Low Tolerance
Marble is prized for its appearance, but it requires careful handling. Made primarily from calcium carbonate, it reacts easily with both acids and alkaline substances.
Most people are aware that vinegar can damage marble. Fewer realise that baking soda can also leave its mark.
When applied repeatedly, baking soda can cause what is known as etching, a dulling of the surface that disrupts its polished finish. Combined with its mild abrasiveness, it can gradually strip away the smooth texture that makes marble so distinctive.
In modern London kitchens, marble is often a central feature. Once its finish is compromised, restoring it is neither simple nor inexpensive.
This is one area where using a product specifically designed for the material is not just advisable-it is essential.
Bathroom Tiles: Wearing Away the Protective Layer
Tiles are designed to handle moisture, heat, and regular cleaning. Their durability comes largely from the glazed coating applied during manufacturing.
Scrubbing tiles with baking soda may seem harmless, particularly when dealing with soap residue or limescale. Initially, the results can even look impressive. The problem lies in repetition.
Over time, the abrasive action begins to wear down that glazed layer. As it thins, the tiles become more porous. This makes them more susceptible to staining and harder to clean effectively.
What started as an attempt to maintain cleanliness can gradually make the surface more difficult to maintain.
Grout, which sits between tiles, often requires more intensive cleaning, but even here, targeted products or gentle tools tend to be a safer choice.
A More Measured Approach to Cleaning
Baking soda is not the problem. The way it is often used is.
It remains useful for certain tasks, neutralising odours in refrigerators, freshening carpets, or loosening grime in controlled situations. The difficulty arises when it is treated as a universal solution without considering the material involved.
Professional cleaners rarely rely on a single product for every surface. Instead, they match the method to the material, taking into account how different substances interact.
That approach may seem less convenient, but it is far more effective over time.
In a city like London, where property maintenance can be both costly and time-consuming, avoiding preventable damage matters. A scratched surface or dulled finish is not always immediately obvious, but it can reduce the lifespan and appearance of household features significantly.
Knowing where not to use baking soda is, in many ways, just as valuable as knowing where it works well.
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