The unique shape of this sponge allows you to easily apply and blend foundation as well as contour and highlight. Apply foundation using the flat surface which has a thin protective film to help reduce product waste. Then, use the rest of the sponge to blend foundation into skin. To clean, wet sponge in cold or lukewarm water. Apply a small amount of facial cleanser, antibacterial liquid soap or sponge cleanser to the stained areas. Gently work into a lather without twisting or stretching the sponge. Rinse and repeat if necessary.