The tea stains and coffee stains in the ceramic water cup are cleaned with toothpaste or edible salt, and the effect is very good. Usage: Rinse the cup with water (no water is left), then rub dry salt or toothpaste on the cup wall, and then rinse the salt with water No matter it is table salt or coarse salt, it can help us remove the tea stains on the cup. We can use our fingers to pick it up, and then scrub it back and forth on the tea stains. In two or three minutes, we will find that the tea stains are miraculous. The land has disappeared! And it is not easy to damage the cup body. Citrus peels sometimes encounter old dirt, and what should I do when I can't clean it with scrubbing? don’t worry! At this time, you might as well look for leftover lemons in the kitchen, or the peels of oranges that you want to throw away after eating! For coffee cups, use lemon slices or a little vinegar to wipe the edge of the cup. For coffee pots, we can slice lemons, wrap them in a cloth and put them on the top of the coffee pot, and fill them up with water. Boil the lemon the way you brew coffee, letting it drip into the jug below. When there is yellow cloudy water dripping out of the coffee pot, this is evidence that citric acid removes coffee stains. Generally speaking, the ceramic water cup can be cleaned in about two times.