You must prep the sponge before using sponge with product to get optimal results. To prep sponge: place sponge under water and squeeze 3 times. This will allow the sponge to expand and become full size. Next, remove sponge from water and squeeze an additional 3 time to release excess water. When sponge is ready to use it should feel damp and no water should be able to be squeezed out of it. Sponge will increase in size. Apply a small amount of liquid or powder on sponge & blend as desired. For best use, make sure to wash sponge with mild soap & warm water frequently & air dry. Precaution: If irritation occurs, discontinue use.