Did you know that loofah sponges are cultivated from plants that belong to the same family as cucumbers? Once the fruit is dried, the skin and seeds are removed to reveal the loofah sponge inside. This natural loofah bath sponge is a great way to exfoliate without the use of chemicals. Hang the loofah by the attached rope to let the sponge dry out between uses. A moist loofah sponge can be sanitized in the microwave by heating it for twenty to thirty seconds.