Are We the Guinea Pigs? What's Really in Your Cleaning Cupboard
The hidden costs of modern cleaning products. Cleaning the house is supposed to make it healthier. I've started to wonder whether that's true.
Walk down the cleaning aisle and you'll find dozens of sprays and wipes promising to "kill 99.9% of germs," plus a fragrance that smells like a fake spring meadow. Most of us grew up trusting them. We assumed that anything sold in a supermarket must have been tested and proven safe. Here's what I found when I looked into it.
What the research is telling us
Your lungs. The largest study I found followed 6,235 people from the European Community Respiratory Health Survey over 20 years. Women who cleaned for a living, or who regularly used cleaning sprays and other cleaning products at home, had a greater decline in lung function than women who didn't clean. For women working as cleaners, the decline was comparable to smoking somewhat less than 20 pack-years. The researchers suspect the cause is irritation: most cleaning chemicals irritate the mucous membranes lining the airways, which over time may lead to lasting changes in the airways.
That is a long-term, day-after-day exposure effect, and it came from ordinary cleaning, not an industrial accident. It's worth noting that the effect was clearest in women, and the researchers noted it wasn't significant in men. The number of men who cleaned was small, so the study couldn't rule an effect out.
📖 Svanes et al., American Journal of Respiratory and Critical Care Medicine, 2018 (DOI: 10.1164/rccm.201706-1311OC)
Disinfectant chemicals in our blood. Quaternary ammonium compounds ("quats") are in many sprays, wipes and disinfectants. Dr Terry Hrubec's research began when mice in her lab started developing birth defects after the lab switched to a quat-containing disinfectant. Her work has since shown that quat exposure can disrupt immune function and cause infertility and birth defects in animal models. She also found that 80% of people in her human study had disinfectant residues in their blood, along with increased inflammation and decreased mitochondrial function.
I want to be straight about what this does and doesn't show. The birth defect and fertility findings come from mice, and Hrubec herself says the chemicals might not be dangerous for humans, but the widespread exposure means more research is needed. In people, it's an association, not proof. Still, a chemical that turns up in the blood of most people tested, and harms animals, deserves more scrutiny than it's getting.
📖 Hrubec et al. on infertility in mice (ScienceDaily summary) · VCOM research overview
Have these products been tested for long-term safety?
Often, not in the way you'd assume. Three things stand out.
You can't see the full ingredient list. The Environmental Working Group reviewed more than 2,000 cleaning products and found that just 7% adequately disclosed their contents. They also point out that ingredient labels are mandatory for food, cosmetics and drugs, but not for cleaning products. That research is US-based. Canada has similar gaps, and New Zealand does not requires ingredients to be listed on labels, yet we trust the familiar brands.
Testing tends to be short-term. The Environmental Working Group says the scarcity of solid data on cleaning product risks shows the need to reform US chemical law so that safety testing is required for chemicals already on the market. An older review noted that many chemicals are tested for acute effects only, so little is known about the risk of normal, long-term, low-level exposure.
Nobody tests the cocktail. Each ingredient might pass on its own. But the whole cupboard is in our air and on our skin together, every day.
📖 EWG Guide to Healthy Cleaning: key findings
The industry sees it differently. The Consumer Specialty Products Association says responsible manufacturers put their products through extensive risk assessments and must meet federal and state safety regulations. I'd like you to hear both sides and judge for yourself.
What about the environment?
Everything we wash down the drain ends up somewhere. Quats are mostly disposed of down the drain, so the biggest environmental effect is on the aquatic environment. (The UK puts this on their product labels.) The picture here is mixed:
An industry-linked review concluded that quats are largely removed during wastewater treatment and bind to sediments, which reduces their toxicity.
Another review of surfactants found that above regulatory limits, they can be toxic to aquatic and terrestrial organisms.
On phosphates, a 2019 study found that they no longer pose a risk in countries with regulated levels, but locally made products in some countries still do. The same study said less is known about the ecotoxicity of the many surfactant types used in consumer products.
That last point sums up the problem. When we don't know, we've been treating the waterways, and ourselves, as the test lab.
So why are they still being made?
I think the honest answer is boring: habit, marketing, and regulations that were designed for a different era. In some places a chemical can go on the market without much proof it's safe, and the burden then falls on scientists to show harm years later. That's slow, and it's why studies like the ones above are only now landing.
And if you could see how your favourite spray is made, would you still buy it? I can't answer that for you, because I haven't seen those factories and won't pretend to. But I'd ask a different question: if the maker won't print the full ingredient list on the bottle, what are they asking you to trust?
That's why I keep my doors open. You're welcome to drop in to my Production Studio and see for yourself where, and how, I make my cleaning products.
The knowledge we lost
Our grandparents didn't need a 12-product cupboard. They had three things:
Baking soda: a gentle abrasive and deodoriser for sinks, ovens, pots and carpets.
White vinegar: cuts through mineral deposits, soap scum and grime on glass and tiles.
Castile soap: a plant-based soap that handles grease and everyday dirt on almost any surface.
Somewhere along the way we swapped that knowledge for convenience, and we forgot how to use it. A few tips that make them work properly:
Don't mix castile soap with vinegar. The acid breaks the soap down and leaves a greasy, curdled residue. Use them separately.
Baking soda and vinegar fizz, but they cancel each other out. It's great for unblocking a drain, but a poor cleaning mix.
Skip vinegar on natural stone like granite and marble, because it can etch the surface.
Soap and water first. Hrubec says cleaning should come first, because using a disinfectant on a dirty surface isn't effective at all. Most of the time, a clean surface is all you need.
Simple doesn't mean ineffective, and it doesn't mean we need a lab to prove each bottle is safe.
Where I've landed
I'm not telling you to panic or throw everything out tonight. I'm asking you to be curious. Read the label, notice what's missing, and try the simple version of one task this week. Let your lungs and your waterways have the benefit of the doubt for once.
What's the first cleaning product you'd swap out? I'd love to hear in the comments.
