Posted by Kevin Vollquartz
on 04 September 2026
Yes, if you judge them on chemistry rather than on the word "natural". Plant- and mineral-based products built around real actives, meaning surfactants, enzymes, oxygen bleach and probiotics, handle almost everything a house throws at them. The gap shows up in two specific places: disinfecting, and old-fashioned kitchen-cupboard recipes, which is where most of the "natural cleaning doesn't work" stories come from.
We make and sell cleaning products, so we have an interest in the answer. Our testing is years of daily use in our own kitchens and bathrooms in Copenhagen, not a lab panel, and we will not dress it up as one. Where a number matters we cite someone who does run a lab.
Does "natural" mean anything on a cleaning label?
Not much: it is not a defined or regulated term for household cleaners, so it can sit on a bottle of almost anything. Plenty of natural substances are aggressive (chlorine is an element, and lye is about as old-school as cleaning gets), while some of the gentlest ingredients in a modern detergent are made in a fermenter.
What a claim has to be is provable. Vague green wording has been getting harder to defend for years, which is why careful brands now name a material or a standard instead of printing "eco" on the front. For the longer version, see our guide to what "biodegradable" actually means on a label.
Which natural cleaning tricks actually fail?
The famous ones fail most often, starting with vinegar and bicarbonate of soda. Mix them in a bowl and you are watching an acid neutralise a base: the fizz is carbon dioxide leaving, and what stays behind is mostly salty water, weaker than either ingredient was on its own. A real reaction, just not a useful one.
Vinegar is also the wrong tool for a lot of surfaces. Marble, limestone and travertine are calcium carbonate, and acid dissolves calcium carbonate, which on a polished worktop shows up as dull etched patches no buffing brings back. The same chemistry makes an acid descaler brilliant in a kettle and ruinous on a stone counter.
Then there is disinfection, which is a different job from cleaning. The US Environmental Protection Agency draws the line plainly: cleaning "removes dirt and organic matter from surfaces using soap or detergents", disinfecting "kills viruses and bacteria on surfaces using chemicals". In the UK a disinfectant also has to be authorised as a biocide and tested to a recognised European efficacy method. Household vinegar has been through none of that, whatever the internet says.
So what actually does the cleaning?
Four families of ingredient do the work, and none of them care whether you call them natural.
- Surfactants lift grease and let water carry it away. They can be made from plant oils or from petroleum, and the molecule does the same job either way.
- Enzymes break down specific soils: proteases on protein stains such as blood and egg, amylases on starch, lipases on fats. The reactions are all hydrolysis, as the Royal Society of Chemistry's teaching notes on stain removers set out: each enzyme cuts big insoluble molecules into small soluble fragments that rinse away. The stain comes apart chemically instead of being melted off with heat. Our older post on how enzymes work in laundry detergent goes through them one by one.
- Oxygen bleach, usually sodium percarbonate, is a dry powder that breaks down in water into sodium carbonate and hydrogen peroxide. The peroxide oxidises the coloured half of a stain until it stops being coloured, and the same notes give the catch: hydrogen peroxide is not a particularly effective bleach below about 40 degrees Celsius unless the formula carries an activator. That is why the instructions ask for warmth and time.
- Probiotics, meaning beneficial bacteria, keep digesting organic residue after you have walked away.
You do not have to take that from a manufacturer. On 25 January 2024 the German consumer group Stiftung Warentest published a test of 15 dishwasher mono-tabs in which the winner carried an eco label, beating every conventional product in the group. The page is in German, and the verdict is free while the full results table is subscriber-only. Ours was not in it, and one result does not make an eco label a guarantee: the 15 tabs ranged from good to poor. It does show that formulation decides the outcome, and that a plant- and mineral-based one can finish first. That is why we build around those four actives rather than around the word "natural", and how the rest of our cleaning range is put together.
Which approach for which job?
Match the active to the soil: surfactants and heat for grease, enzymes for food and body stains, oxygen bleach for tea and wine, a mild acid for limescale. The table below is how we split it in our own kitchen.
| Job | What actually works | What to skip |
|---|---|---|
| Greasy pans and baked-on food | A concentrated surfactant and hot water, with a stiff brush | Vinegar sprays, which do next to nothing on fat |
| Food stains in laundry | An enzyme detergent, plus a soak for older marks | Hotter and hotter washes, which can set protein stains |
| Dull whites and tea-stained mugs | Oxygen bleach, warm water, time | Chlorine bleach on coloured fabrics |
| Limescale in kettles, taps and toilets | A mild acid such as citric acid, or a descaling tablet | Scouring, which scratches the surface scale sits on |
| Odours that keep returning | Removing the residue feeding them, then a probiotic cleaner | Fragrance sprays, which cover the smell and leave its cause in place |
| Disinfecting after raw meat or illness | Clean first, then a product registered as a disinfectant | Any product that only says "kills germs naturally" |
Is probiotic cleaning real, or marketing?
There is real published research behind it, though almost all of the strong evidence comes from hospitals. A 2016 study in PLOS ONE tested a cleaning system based on Bacillus spores across the surfaces of an Italian hospital and reported contamination falling by up to 98% against the same surfaces under conventional disinfectant cleaning, with antibiotic resistance genes in the surviving microbes decreasing over the trial. The company that supplies the system paid for the work, which is worth knowing before anyone quotes the number at you, so treat it as directional.
A toilet at home is not a hospital ward. The mechanism does carry over: the bacteria colonise the surface and keep breaking down the residue that odours and stains grow out of, where bleach sterilises for an hour and leaves a blank surface for whatever lands next. That is the logic behind our probiotic toilet bowl cleaner tablets, which fizz and dissolve in the bowl and keep working between cleans. The practical version is in our guide to using probiotic toilet tablets.
What do we notice using our own products at home?
The chemistry is rarely the problem; the habits take a fortnight. The switch that takes adjusting is the solid dish soap bar. You work the brush or sponge into the bar instead of squeezing a bottle, and for a week it feels like you are under-dosing. You are not. Greasy pans still want properly hot water, exactly as they did with bottled washing-up liquid: a limit of grease, not of the bar.
The tablets removed a decision. A pre-measured laundry tablet goes in the drum and that is the whole task, which quietly ends the pouring by eye a measuring cap encourages, and it works at any wash temperature. Dishwasher tablets are the same story, with one caveat: in a hard water area the salt and rinse aid still matter, and when they get skipped the tablet takes the blame for cloudy glasses. That is not a plant-based failing either: the mono-tabs in that German test need the same support.
The tools wear differently. A loofah sponge dries stiff and softens the moment it is wet again, which reads as worn out and is nothing of the sort. A bamboo brush handle darkens where it sits in water. Neither changes how they scrub.
Probiotic toilet tablets need patience. Drop one in, let it fizz out, brush and flush. What you are judging shows up over weeks, in how the bowl behaves between cleans, not on day one.
Where do plant-based products still lose?
Plant-based products lose on heavy disinfection, which needs a registered disinfectant used properly, and at the far end of stain removal, where chlorine bleach still does things oxygen bleach cannot. Hard water makes every detergent work harder, since it has to deal with dissolved minerals before it gets to the dirt, so a cool short cycle in a limescale-prone area can disappoint for reasons unrelated to the formula.
Beyond that, most performance complaints about plant-based cleaners turn out to be dosing and method problems: too little product, water that is not hot enough, no soak time, or a worn-out brush doing work the chemistry was never going to do alone.
