1. Wet the teacup with clear water first, and then wipe it with a special soft cloth.

2. Wipe the inside and outside of the teacup thoroughly with a pen or soft cloth.

3. Inject hot water and heat the teacup.

4. After the lid of the teacup is opened by heat, open the lid and pull it up and down several times to completely absorb the heat in the teacup.

5. Add tea leaves, inject hot water, cover, let stand for a few minutes, and pour out the waste water.

6. Wipe the inside and outside of the teacup with a pot pen or a clean soft cloth to ensure that there is no water stain inside and outside the teacup.

The above steps are for reference only, and you can consult professionals for more accurate guidance.