Description Effect & Bacteria Our sponge provides a gentle way to remove cleanser and as it is made with synthetic material it does not harbour bacteria. Application Much like a muslin cloth or flannel, our sponge can be used to gently wipe away cleanser when washing your face by using lukewarm water. This sponge can also be used to remove our Active Exfoliant 11% and 7% with lukewarm water once it is time for it to be removed. This sponge can be machine washed. Science Not Miracles Our sponge provides a gentle way to remove cleanser and our active exfoliants.