To maintain the freshness and effectiveness of herbal bath powder, proper storage is essential. Transfer the powder into an airtight container, such as a glass jar or sturdy plastic container, to prevent exposure to air and moisture. Keep the container in a cool, dry place away from direct sunlight, as heat and light can degrade its natural properties. Avoid using wet hands or spoons to handle the powder, as even small amounts of moisture can cause clumping or spoilage. By following these steps, you can preserve the quality of your herbal bath powder for a longer period.