Can a cup of orange peel have a cleaning effect?

A few days ago, the editor saw a message from a friend, "The insulation cup soaked in orange peel all night, and the next day found that the wall of the part of the cup that contacted the water was bright and smooth, and the wall of the cup that was not soaked in the water cup was dark. Why is this?"

Editor hasn't replied to netizens since seeing this message.I'm still not sure, because I haven't experienced this kind of situation in my career for so long, which is probably the reason why I never soak in orange peel? So can a cup of orange peel have a cleaning effect?

In order to understand what is going on, editor first searched for the answer online.Two completely different explanations have been obtained. One is that the orange peel will deteriorate after being soaked for a long time, and the smooth surface of the water cup wall is only caused by the adsorption of deteriorated substances;Another reason is that orange peel has substances similar to citric acid, which will corrode the surface of objects.However, due to its small acidity, it will not damage the metal, but it will decompose the daily residual impurities on the metal surface into water, so that the wall of the cup will be smooth.

In a scientific and rigorous manner, editor found three water cups with different tank conditions for testing.

A: A lot of tea stains remained on the cup wall because the inner liner was not cleaned carefully when trying to make tea;

B: The new liner, but not cleaned, is used as if it was just purchased;

C: Clean the tank carefully and dry the water.

Pour about the same amount of orange peel into the three tanks respectively, take 300 ml of boiling water to brew, then cover it and let it stand for 8 hours.After 8 hours, open the water cup, and I wanted to see if the color of the water was different, but because of the amount of orange peel may not be well controlled, which is relatively large, and the heat preservation performance of the water cup, the orange peel in the cup is obviously swollen, and the three cups of water are very turbid, so I had to pour out the whole part and compare it.

After pouring out and drying the three cups, the inner wall of water cup A has obvious boundary.The lower part of the bubble in the water is brighter, and the upper part is slightly darker than before, but because the lower part is obviously brighter, the upper part will feel darker.

There is also a dividing line inside the B cup, but it is not as obvious as the A cup. The lower part is still brighter than the upper part, but it is not as obvious as the A cup.

C The inner boundary of the water cup is almost invisible if you don't look carefully, and the upper and lower parts are basically the same color.

Touch the three cups with your hands. The lower part is indeed smoother than the upper part.After all the water cups are cleaned, it is found that the inner boundary of water cup A is still obvious.So through the real test, editor concluded that the orange peel can really clean the inner wall of the water cup after soaking in high temperature hot water. The more impurities in the water cup, the more obvious the dirt.However, after soaking the orange peel, it is recommended to wash it with clean water before use.