1. Unopened antibacterial ultra‑light clay generally has a shelf life of 24 months when stored in a cool, dry place away from direct sunlight. Overheated or humid storage conditions will shorten its normal storage time.

2. Once the package is opened, the clay will gradually dry and harden after contacting air, and its optimal service period will be shortened. Make sure to seal it tightly after each use to reduce air intake and slow down water loss and drying.

3. If the clay becomes lumpy, cracked, mouldy or develops strange odors, it is not recommended for further use even if it does not exceed the shelf life marked on the package. Air‑dried and hardened clay cannot regain its original texture and should be replaced in time.