Is the double cleanse officially over? Experts explain

Oil and water do not mix, as you may remember from physics class. Oil molecules are hydrophobic, meaning they repel water, so they form a clear layer on top of water.
But with a little work, chemists can combine oil and water into two-phase formulations, providing these two steps in one product.
Take the Strip Caviar Jelly Makeup Remover, for example: it contains two-phase microfluidic technology to suspend the tiny bubbles in the jar that burst after being rubbed into the skin. (Yes, it’s as satisfying as it sounds.) Once emulsified with water, it turns into a thin, watery confection that easily removes all traces of makeup and sunscreen.
Renée Rouleau Better Than Balm also contains two-phase technology based on sucrose laurate, a sugar-based emulsifier that helps ensure the oil turns into a gel. The cleanser first looks like a silky light oil, then transforms into a milky gel to remove dirt and stubborn make-up.
Covey’s First Of All Cleanser, on the other hand, provides more lather thanks to babassu oil and coconut surfactants. “Babassu oil nourishes and cleanses the skin, but acts as a cleansing catalyst, acting as an oil component and makeup remover,” says board-certified dermatologist Julie Russak, MD. “Coconut surfactants are what bind dirt and makeup together. serving as a foam to remove dirt, grime, [and] make-up without removing the skin and moisturizing”.
It’s really about how different active ingredients interact in certain concentrations that allow them to provide both oil-based and water-based cleansing properties, Russak adds.