1, edible alkali, first pour enough edible alkali into the container to be cleaned; Pour the freshly boiled water into the container, and be careful not to spill the solution; Then soak for about 15 minutes; Finally, put on rubber gloves to scrub, and then clean with water normally.

2. Put a few slices of lemon peel and orange peel in the cup, or drop a few drops of vinegar, and then soak it overnight; The skins of apples and other fruits can be removed by dipping a little salt in the skins and then scrubbing the cups.

Soak the rag in milk to wipe the cup, and the dirt will be removed soon.

4. Soak in Taomi water for one night. This method is also applicable to glasses, stainless steel cups and ceramic cups.

5. Clean quickly with toothpaste. Rinse the inside and outside of the cup with clear water first, then apply toothpaste on the cup, scrub it hard, and then rinse it with clear water.

6. The quickest way is to use bleach. Just put the cup in a basin filled with water, add a little bleach and soak it for a while to clean it.