Buy Biotherm Cleansers - Biotherm Biosource Hydra-Mineral Cleanser Softening Mousse 150ml/5.07oz - Dry Skin. How-to-Use: Dampen face with water. Dispense gel into the palm of your hand and work into a lather with water. Massage delicately into the face with circular strokes and rinse off abundantly with lukewarm water. Use daily, morning and evening.