The short version
At its core, real soap is made of surfactants, molecules that bring grease and water together. That is what makes soap so versatile: it grabs the dirt and rinses it away, whether on skin, dishes or tiles. A good plant-oil soap therefore replaces half a drugstore, for people, household and pets.
Our bathroom and cleaning cupboard overflow with bottles: shower gel, hand soap, washing-up liquid, all-purpose cleaner, glass cleaner. Yet many of them contain the same thing at heart: soap. More precisely surfactants, which is exactly why a single high-quality bar or liquid soap can take over so many jobs.
Here is where you can put it to work, sorted by people, household and pets, plus the one honest limit where soap simply is not the right tool.
On people
Body wash
A little liquid soap on a washcloth, or dilute one part soap with three parts water in a foaming pump. Gentle foam, no microplastics.
Hair
Use diluted as a shampoo, then an acidic rinse (apple cider vinegar 1:1, or lemon juice 1:2). It closes the cuticle and leaves hair soft.
Hands & face
As a mild foaming hand soap or a gentle facial cleanse. Choose a nourishing olive-oil variety for sensitive skin.
In the household
Washing up
A few drops in the water cut grease reliably. For stubborn spots, apply directly to the sponge.
Mopping floors
About a quarter cup of soap in a bucket of warm water. Streak-free and without the harsh cleaner smell.
Laundry
Around 60 ml of liquid soap per load, mild to skin and fibres, with no fragrance residue.
Fruit & veg
One drop in a bowl of water, swirl briefly, rinse clear. Removes waxes and soil gently.
Recipe · 2 minutes
DIY all-purpose cleaner
Replaces pricey spray cleaners, cheap, mild, effective.
You need
- 1 empty spray bottle (about 500 ml)
- 2 tbsp liquid castile / natural soap
- 500 ml water, optional 10 drops lemon essential oil
How to
Water into the bottle, add soap, optional oil, swirl gently, done. Spray on the surface, wipe with a cloth. Important: never mix soap with vinegar, soap and acid curdle. Keep vinegar separate for limescale (see below).
On pets
Washing the dog
A mild, unscented natural soap, well diluted (about one part soap to three of water), massaged in and rinsed out thoroughly. Avoid the eyes. For a tailored recipe see our guide on DIY dog shampoo.
Not for cats
Cats are different: many essential oils are toxic to them and they groom themselves. Please read caring for cats before reaching for any soap.
Where soap reaches its limit, honestly
Against limescale and water spots soap does not help, that needs an acid: vinegar cleaner or citric acid. This is exactly where we are not eco-dogmatic: natural where it works, effective where the problem demands it. The how-to is in our guide on removing limescale naturally.
Find your everyday soap
Once you have one good, versatile soap, you replace a whole shelf of products. What to look for:
- Plant-oil based, short and readable ingredient list
- Mild and nourishing for skin, unscented for sensitive use
- A liquid castile soap is the most versatile for the recipes above
Frequently asked
Can one soap really replace shower gel, hand soap and cleaner?
Why should I not mix soap with vinegar?
Is natural soap safe for sensitive skin?
Find the right soap
From the original bar to the solid shampoo, we help you choose.
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