How to remove tea stains from thermos cups How to remove tea stains from thermos cups

1. Tea stains in the thermos can be washed with salt. Pour the salt on a sponge or rag, rub it a few times where tea stains are found, and then rinse it off with clear water.

2, white vinegar can also clean tea stains, tea stains are alkaline substances, white vinegar is acidic, and can be neutralized by acid and alkali to achieve the effect of removing tea stains.

3. Toothpaste contains friction agent, which can also effectively remove tea stains.