Clock, you can shine like a new one. Exquisite tea sets such as crystal glasses can be wiped with cloth dipped in vinegar, and the details turn black.
Wipe gently with a soft toothbrush dipped in vinegar and salt solution. Besides, after washing the glassware with water, pour it.
If you brush it with warm water of about 40 degrees and let it dry naturally, you can also remove the tea dirt from the bottom of the cup.
Wash the inner container of the overflow cup, soak it in vinegar for one night, and then wash it with clear water to remove tea stains.
From: Pinshi Tea City Network