Dove Soap For Hard Water . Use this when you’re not showering to help soak up unwanted oils and nasties of hard water. After few uses only my skin was moisturized and hydrated my skin. Dove Micellar Sensitive Skin Soap Bar 2Pcs from www.cellsii.com Second, soap scum is formed by mineral in tap water combined with soap. Titanium dioxide occurs naturally in the earth’s crust. Kaolin also makes dove white.