◇If the sponge gets dirty, the surface of the foundation will harden and it will be difficult to apply to the skin, so please keep it clean at all times. ◇If the sponge gets dirty, please use the separately sold "Shiseido Sponge Cleaner N" or gently press and wash it with a diluted neutral detergent in lukewarm water. After rinsing thoroughly to remove all detergent, drain the water and dry well in the shade before using. ◇If the feel or finish of the sponge becomes poor, please purchase a new sponge.