How do you get tea stains out of cups? To remove tea stains from cups, wet the inside of the mug with cold water, and sprinkle in a thin layer of baking soda, so that it covers all brown marks (it should stick easily to the damp sides of the cup). Leave for a few minutes, and then use a cloth or sponge to wipe all around the brown ring.
How do you remove tea stains from plastic cups? Rubbing Alcohol. Rubbing alcohol can be used to clean coffee, tea, tomato sauce and tomato paste, juice and soda stains, and discoloration caused by most types of food dyes. Usually, the discoloration can be removed if you rinse the item immediately after applying the alcohol, or by washing it with water and detergent.
Can you use bleach to remove tea stains from cups? In a large bowl, pour in 1 gallon of warm water and 1 tablespoon bleach. Soak the mug for as long as it takes for the stains to disappear, anywhere between an hour to overnight. Alternatively, you can use a scrubbing sponge to scrub the mug until clean. This is the strength of bleach water used to sanitize dishes.
What causes brown stains on tea cups? THE REASON is that tea contains tannin (or tannic acid) which gives tea its colour. Tannin is used as an agent for many dyes such as in the tanning of leather and in making ink, hence the reason that a stain is left in cups.