Alternatively, you can use a scrubbing sponge to scrub the mug until clean. This is the strength of bleach water used to sanitize dishes. If your stains don’t come out, you can increase the strength of the bleach water but be sure that you wash the mug off very, very well afterwords.

Rinse the mug thoroughly after cleaning. You do not want to ingest the magic eraser cleaner.

Be careful with these products, however, as they can be too abrasive and cause scratches. To avoid this, test the product on the underside of the mug before using it on the the rest of the item. You can also use a high quality stain remover, such as Oxi-Clean. Add the cleaner to a mug of hot water and let it soak until the stains disappear. Once they are gone, rinse the mug thoroughly.

Like all commercial cleaners, it is important to wash this cleaner off completely before using your mug again.

Rinse the paste off the mug and repeat if necessary. A new coat of paste should get deeper into the stains. Baking soda creates the perfect amount of light abrasion to remove mild stains.

You can also use a lemon peel to scrub the salt into the mug. While the salt is an abrasive, the lemon is a bleaching agent, helping to eliminate the stains. [4] X Research source

Rinse the mug clean once the fizzing stops.