First of all, we have to do the preparatory work. The main contents of the preparatory work are:
1. Prepare a pot of clean water
2. Prepare a clean cup cloth
3. Prepare a clean round tray and take the cleaned water cup out of the washroom
The next step is to master the skills of cleaning this link:
1. Hold the corner of the cup cloth with your left hand, wrap the corner of the cup, and place it on top of the boiling water to fumigate, so that there is water vapor on the wall of the cup.
2. Hold the cup towel with your right hand, put it into the cup, assist the cup to rotate with both hands, and wipe the cup corner, cup arm and cup mouth
3. When wiping, the force should not be too large to prevent breaking the glass
4. After wiping, check the cup against the light to ensure that there is no damage, no stains, and no water marks.