Product preserve instruction:
1. Before first using, please wash with hot water or a cleaning agent to remove surface dust.
2. Dont use on open flames or over a direct heat source.
3. Dont pull and impact it violently or scratch it with sharp things.
4. Dont use abrasive soap or scouring pad to clean them.
5. In order to avoid the dust, dont direct exposure it to the air for a long time.