1. Just fill the mug with Coke, soak it for two hours, and then drain it. Finally, rinse it off with clean water and a dish towel.
2. Put a similar amount of salt and vinegar into a bowl and mix it evenly. Then use a small brush or toothbrush to brush it. After repeated rinsing, the stains inside the mug can be eliminated.
3. Squeeze the toothpaste on the unused toothbrush, and then you can brush the stains inside the mug. It only takes a few minutes to clean it. Finally, just rinse it with water.
4. First cut the potatoes and soak them in hot water for 2 minutes, then you can use the hot water that has soaked the potatoes to clean the tea stains in the cup, which is time-saving and fast. In fact, rice washing water, noodle cooking water, and dumpling cooking water can be used to remove tea stains better.