Household cleaners: what works, what harms, what misleads

Under an average kitchen sink, there’s a limescale remover, two sprays, bleach, three half-used bottles of laundry detergent. Most of these bottles do the same job with different labels. Some are useless, others dangerous as soon as you mix them. I sorted through what the tests and the poison centres say.

The real danger: mixing

A single product is rarely the problem, it’s what you add to it. Bleach plus vinegar, or bleach plus an acidic descaler, releases chlorine gas, the so-called “chlorine cough”. Bleach plus washing soda produces dichlorine too, a gas that burns the airways. The reaction gets worse with hot water or concentrated products.

This directly concerns toilets. A gel descaler such as Harpic 100% descaler contains hydrochloric acid, and pouring it onto bleach, or the reverse, is exactly the scenario to avoid. If you want to use both, clean in two steps, with a full rinse in between.

Toilets: the blocks that hang in the bowl

Que Choisir tested 14 toilet blocks, the products that sit in the bowls of 15 to 20 million households (Harpic, Canard, Bref WC and La Croix are familiar names). Most of them release compounds you wouldn’t want in your home air, and most contain substances harmful to aquatic life, released with every flush.

For toilets, a gel carrying an eco-label and a brush already do the job, with nothing hanging in the bowl.

Laundry: the trap of alternatives

Que Choisir tested wash nuts, wash balls and water alone. The verdict is blunt: performance is poor, barely better than water. Greasy stains don’t come out any better, nor do protein stains. The only exception noted: a Magic Ball from Carrefour did clean carrot purée. Another, the Gargouilles ball, did no better than water in a wash, for whiteness or colour preservation.

A real detergent relies on its enzymes, which break down protein and starch stains, and on its surfactants, which lift grease. A ball replaces those two ingredients with nothing. It isn’t dangerous, it’s useless, and you end up washing worse while thinking you’re doing well.

Dishwasher: the eco-label makes the difference

Que Choisir tested 20 products for cleaning and environmental impact. Tablets with the European eco-label score best on the environment, because they avoid substances that don’t biodegrade, that accumulate in organisms, or that are toxic to aquatic life. Among those examined:

• L’Arbre Vert: eco-labelled, but average cleaning and limescale marks
• Sun Pouvoir de la Nature 0%: no phosphates, preservatives, dyes or fragrance
• Rainett 3-in-1 with bicarbonate: recently awarded the eco-label

The homemade recipe Que Choisir tested (percarbonate, washing soda) has a minimal ecological impact, but it doesn’t give spotless dishes, even in soft water. And both percarbonate and washing soda irritate the skin and eyes: wear gloves and goggles when you prepare it.

Disinfecting: rarely useful, sometimes misleading

60 Millions de consommateurs found household disinfectants that aren’t always effective. At home, outside contagious illness, an ordinary detergent and hot water do most of the job. A disinfectant adds chemistry and pollution for a gain that is often uncertain.

What I take from it

I couldn’t consult Que Choisir’s full rankings, so I’m not naming any brand as the best. If you want to choose, open their comparisons. In the meantime, three simple habits: never mix two products, look for the European eco-label, and leave the wash balls on the shelf.