My question is .... does it matter ?
Its just a cup .
Vinegar or lemon juice is better than bleach, (let it soak), bleach doesn't actually remove the stain as it changes its structure to refract light so as not to be seen.
Bleach is also highly toxic and an asthmagen.
Id truly recommend only using it as a last resort..... and use gloves in a well ventilated area.
Toothpaste is also a good alternative.
Personally - i love my tea strong, like my coffee.
I have no problems with stains....maybe except on my inherited coffee pot, but then thats because it got scrubbed. Its no biggie - thr coffee still tastes the same.
Sometimes we can get so obsessed about things being perfect, they just stress us out.
The important part is:
Tea and coffee are delightful 🤗
