Clean the pieces with a flannel or cotton cloth just after having worn them, to remove residues of cosmetics and transpiration. You may also use neutral soap and cold water, but do not soak the pieces. Rinse well and dry them using a soft cloth or soft paper tissue. Do not wash pearl bracelets and necklaces, as the humidity rots the silk thread. Pearls and mother-of-pearls improve their shine if slightly rubbed with olive oil or almond oil.