How do you use a shampoo bar, step by step?
Shampoo bars put a lot of people off for one simple reason: the first time, we use them like liquid shampoo, and they don't behave the same way. The routine changes slightly. Once you've got it, you keep it.
- Soak your hair properly, until it is dripping wet, not just damp. Water is what makes the lather.
- Run the bar under the water for a few seconds, then rub it straight onto your scalp in small movements. Five or six strokes are enough.
- Set it down out of the water and massage with your fingertips. The massage builds the lather, not the bar.
- Let the lather run down your lengths as you rinse. There is no need to rub the bar on the ends.
- Rinse for longer than usual, a good minute in lukewarm water. It is the step everyone rushes.
If your hair is long or thick, do two quick rounds rather than one long one: the first cleans, the second really lathers.
Straight onto your hair, or between your hands?
Both work. Rubbing the bar directly on the scalp is the most efficient: the product goes where it is needed, and less is wasted.
Lathering between your hands is gentler and easier to dose. That is what I suggest for short hair, very fine hair and sensitive scalps that don't like being rubbed.
Why does my hair feel heavy after a shampoo bar?
It is the most common complaint, and it almost always has a simple cause. Here is how to find yours:
| What you notice | Likely cause | What to do |
|---|---|---|
| Heavy roots, clean lengths | Rinse too short | Rinse one minute longer, in lukewarm water |
| Dull hair with a “waxy” feel | Very hard water | One vinegar rinse a week |
| Sticky hair from the first wash, no improvement | A soap sold as a shampoo | Check the ingredient list |
| Scalp gets greasy faster for 2 to 3 weeks | Transition period | Keep going: it settles |
The third case deserves a closer look: many “shampoo bars” are actually saponified soaps, which aren't made for hair. I wrote a whole article on waxy, sticky hair after a shampoo bar and how to spot a real shampoo from its label.
Shampoo bars and hard water: what to do?
All three of our shampoo bars cleanse with sodium cocoyl isethionate, a gentle surfactant derived from coconut. It isn't soap, and it reacts far less with limescale than soap does. You can check its function in CosIng, the European cosmetic ingredient database.
With very hard water, the first few washes can still leave hair a little heavy: that is limescale settling, not the shampoo. Two habits fix it. Rinse for longer in lukewarm water and, once a week, finish with a rinse of one tablespoon of cider vinegar in a litre of water.
How often should you wash?
As often as you did before, to start with. Nothing says you have to change your routine the day you change format.
What does change, often, comes later. When you leave a conventional liquid shampoo, your scalp takes two to three weeks to rebalance. After that, many customers tell me they wash less often without even trying.
Which shampoo bar for your hair?
The routine is the same for everyone, the formula isn't. Here is how I designed them:
- NEPTUNE, with spirulina, for all hair types and the whole family: the most versatile one, where to start if you're unsure.
- ATLAS, with ghassoul clay, the shampoo bar for oily hair and scalps that get greasy fast.
- ZEFIR, with jojoba and white clay, the shampoo bar for curly hair, dry or damaged hair.
All three are sulfate-free and silicone-free. If your lengths tangle, the HORIZON conditioner bar goes on right after, on the lengths only. And if you want to compare in more detail, my guide to choosing a shampoo bar covers the four things to check on a label.
How do you store it between washes?
A shampoo bar wears down mostly when it can't dry. Left in a puddle on the edge of the bath, it melts within weeks. Kept dry, a 90 g bar lasts up to 60 washes, the equivalent of four 250 ml bottles.
Keep it out of the shower stream, on something that lets water drain away. For travel, the cork soap box protects it and lets it breathe. All the details are in my article on how long a shampoo bar lasts.
