New cup to taste method:
Boiling water to taste method:
First wash the cup with detergent, and then poured into the water, placed 2 hours, can be washed.
Milk to taste:
First wash the cup with detergent, and then pour 2 tablespoons of fresh milk, shake 1 minute, and finally the milk drained, the cup can be washed clean.
Orange peel to taste:
First wash the cup with detergent, and then fresh orange peel into the cup, and then placed 4 hours, the cup can be washed clean.