When finish the cleaning, for the purificant, the tumbling box will be black. It will not affect the use. And after some time it will renew.

• 除垢完毕后,洗衣机滚筒因受除垢液的作用,表面会略呈暗乌色,但不会影响正常使用,洗几次衣服后即可恢复原状。