The Dr. Hauschka Cleansing Sponge is a gentle and safe product to use, but it is important to keep a few precautions in mind. Before use, make sure your skin is clean and dry. Avoid direct contact with your eyes and rinse the sponge thoroughly after each use. If you experience any irritation or allergic reaction, discontinue use and consult a health professional. Remember that everyone is different, so it is important to test a small area of skin for sensitivity before first use.