To retain its quality for a long time, cashmere requires some special care. Cashmere loves water. Wash it regularly in a machine on a wool programme (30°c, 600rpm), using wool detergent or baby shampoo and no softener. Put each garment in a separate washing bag or pillow case. Do not run a cycle with more than three garments at once. After washing, dry the garment flat on a towel. Iron at low temperature, using a damp cloth between the iron and the cashmere. Store the garment folded in a drawer or on a shelf. Read more here.