Wash-n-Go with The Doux Mousse YouTube Video. In this video I show step-by-step how to achieve fantastic curl definition using the wash-n-go technique with The Doux We Want Easy Leave-In Conditioner and Mousse Def Texture Foam. I never thought in a million years that I would be able to get super defined curls on my 4C natural hair using a mousse. I like using a mousse because my hair drys quickly and I don't experience flaking. Have you used The Doux Mousse before? If so leave a comment!