Hot weather makes drinking tea very refreshing, but over time, cups always accumulate a lot of tea stains. This not only affects the cleanliness and appearance of the cup, but tea scale also contains harmful metals such as cadmium, lead, mercury, and arsenic, posing a hazard to human health. It seems that removing tea scale is not only about cleanliness and appearance, but also about health. What methods can easily remove tea scale? The following 10 methods have excellent descaling effects!

1. Tea stains in a cup are difficult to wash off with water. Put a few pieces of dried tangerine peel in the stained cup, add hot water, and let it soak overnight (a shorter time might also work). The next day, just scrub it off, and the cup becomes very clean.

2. The best method is to use alkali flour, which is the baking soda used for making pastries in supermarkets. Pour a little onto the area you want to clean, wipe with a cloth, and you will find this is the cheapest, most effective, and safest cleaner in the world—whether for removing tea stains or stains on the sink. Give it a try; you won't regret it.

3. Put potato peels in a teapot or teacup, pour in boiling water, let it cool, and then rinse. This can also remove scale.

4. Put a little salt or a bit of toothpaste into the teacup. Salt and toothpaste are very effective at removing cup stains and are good cleaning agents for washing cup stains.

5. To remove tea scale from metal tea strainers: Metal tea strainers can become blackened from tea scale. Soak them in vinegar or bleach to easily remove the scale.

6. To remove tea scale from teacups or teapots: When teacups or teapots have been used for a long time, they accumulate a lot of tea scale. Scrub with a sponge dipped in salt to easily remove it.

7. To remove tea scale and water stains from porcelain: Use lemon peel that has been squeezed of juice, soak it with a small bowl of warm water in the container for 4–5 hours, and it can be removed. For coffee pots, wrap lemon slices in a cloth, place them in the upper part of the coffee pot, fill with water, and brew the lemon like coffee, letting it drip drop by drop into the lower pot until yellow, turbid water drips out.

8. Crush eggshells, put them in the teapot to be cleaned, then pour in half a cup of vinegar, shake slowly, and then scrub with a brush. For cups with narrow mouths that are difficult to clean at the bottom, put crushed eggshells inside, add some hot water and an appropriate amount of dish soap, cover the cup lid, shake up and down, and then rinse several times with clean water.

9. Leftover cold beverages, such as cola or soda, can be used as cleaning agents to clean containers with tea scale or water scale. This is because the acidic substances in cold beverages undergo a double decomposition reaction with tea scale and water scale. The harmful substances in the scale dissolve into the beverage. Therefore, generally do not use cups with tea scale or water scale to drink cold beverages.

10. Break vitamin C tablets into pieces, then put them in a cup with warm water and stir. This easily removes dirt. After adding the "cleaning agent," it's time to clean the cup. However, because the cup mouth is narrow, fingers cannot directly reach all parts of the cup wall. At this time, a toothbrush can help; use the toothbrush to clean the tea stains on the cup wall little by little.

Once the cup wall is clean, the cup bottom is still out of reach for the toothbrush. At this point, wrap clean gauze around a chopstick, dip it in salt, and scrub the cup bottom. This way, a brand new, clean teacup will be "radiant with vigor."