1. The salt that can be encountered when cleaning water cups at home every day, whether it is fine salt or ordinary coarse salt, is a good choice for cleaning tea stains in water cups. Take a small amount of salt and wash it back and forth on the stain, and you will find that the stain disappears in an instant. This will not scratch the cup wall, and you will not worry about chemicals hurting your body.

2. When cleaning water cups, orange peel is also a good sterilization choice. You can wipe the scale in the cup with orange peel back and forth, and it is better to add a little vinegar at the same time. This method is safe, simple, hands-free, and especially clean.

3, kitchen cleaner or detergent, when cleaning the cup with detergent, simply wipe it with a soft rag, rinse it with water for several times after cleaning, to avoid the detergent residue adhering to the cup wall. In addition, you can also add a little kitchen bleach to a large basin of water, soak the cup in it for a while, and then rinse it with clear water. Detergent and bleach are both chemicals, and long-term use will affect the body. Pay attention to the dosage when using, rinse with clear water several times, and generally use it when cleaning heavy dirt.

Toothpaste has many uses, and it can also be used to clean the scale on the water cup. Toothpaste does not need to be squeezed too much. It is a chemical product, containing abrasive particles and more foam. Squeeze some toothpaste into the cup with a soft brush or toothbrush. Add water to the cup and gently brush it back and forth. Be careful not to push too hard, it will scratch the cup wall. A cup with heat preservation function may lose its heat preservation function.