Ensure the baby bathtub is completely dry before storing it to prevent the growth of mold or mildew. If the bathtub has any removable parts, disassemble them as instructed by the manufacturer. Find a clean and dry storage area for the baby bathtub. It could be a cupboard, shelf, or designated storage space in your bathroom. If the bathtub is collapsible or foldable, follow the manufacturer's instructions to fold it and store it in a compact manner. Consider using a storage bag or container specifically designed for baby bathtubs to protect it from dust or damage. Avoid storing the baby bathtub in a damp or humid area, as this can promote the growth of mold or mildew. Choose a location that is cool, dry, and well-ventilated.