No matter dry or wet skin, it can be useful. The rate of hair growth slows down as the number of uses increases. You will gradually see changes if you keep using it for more than a month. ➤ Don't use it too hard on the skin. ➤ Recommended use: once every 2-3 weeks. ➤ If you have sensitive skin, try it on your arms/legs before using it on other sensitive areas. ➤ Wet the hair removal area before use for better hair removal. ➤ After each use, rinse with running water to brush away any debris: hair, dead skin, and store in a dry place. ➤ We do not recommend using the Crystal Hair Remover on sensitive skin such as the face and underarms since it may cause irritants.