◇If the sponge gets dirty, it will be difficult to apply foundation, so please keep it clean at all times. ◇If the sponge gets dirty, please use the separately sold "Shiseido Sponge Cleaner N" or dilute a mild detergent in lukewarm water and gently press the sponge to wash it. After rinsing thoroughly to remove all detergent, drain the water and dry well in the shade before using again. ◇If the feel or finish of the sponge becomes poor, please purchase a new sponge. ◇If it no longer opens and closes smoothly, please purchase a new foundation case.