Why take a bath with citronella and grapefruit leaves on New Year's Eve?

According to reports, when the Hakkas boil water and take a bath on New Year's Eve, they will put grapefruit leaves in it, which means to wash away all the bad luck last year and have good luck in the new year. Some people also add orange peel or citronella. Although the times are constantly changing, Hakka people have never forgotten this custom. After scientific verification, this method can make grapefruit leaves release a lot of vitamin C, which can really bring benefits to the human body, at the same time, it can wash away the cold and dirt of the body, activate the bones and muscles, and give people a unique sense of comfort.