Quick answer
Oil dissolves oil. That one fact explains why a single foaming wash leaves sunscreen behind — and why double cleansing is not just a K-beauty ritual.
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Shop verified makeup removers & cleansing oils →The principle
Water-based cleansers do not fully remove oil-based products. Sunscreen, most makeup and sebum are oil-soluble. An oil-based first step dissolves them so the second, water-based step can rinse everything away.
1. Step one — oil, balm or micellar, on DRY skin
On wet skin the oil cannot bind to what you are removing.
2. Emulsify with water before rinsing
Add water and keep massaging until it turns milky. Skipping this leaves a film.
3. Step two — your normal gentle cleanser
4. Night only
Mornings do not need it.
Who needs it
Anyone wearing sunscreen (so, everyone), makeup, or living in a dusty city. If you wear neither and stay indoors, one cleanse is enough.
Who should be careful
Very dry or compromised skin — use a gentle micellar rather than a heavy balm, and do not massage for minutes.
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Cleansing oils & micellar · gentle cleansers