Which Natural Cleaner is best to remove tea stains?

Which Natural Cleaner is best to remove tea stains? I pitted Bicarbonate of Soda against Citric Acid.

The Citric Acid won for elbow grease factor! It was so easy to do.

Follow these instructions to remove tea stains with a citric acid natural cleaner:

1. Add one spoon of Citric Acid to the mug
2. Pour over Boiling water
3. Leave to cool down
4. Gently wipe the stains with a brush or sponge
5. Rinse out.
6. See the sparkle!