2. Generally, it is simply bitter, because grapefruit peel contains naringin. It is normal that the grapefruit peel will release this ingredient when it is soaked for too long, and it will melt into citron tea, making its taste bitter. If you don't want to make citron tea miserable.

3. It is suggested to remove the white capsule of grapefruit peel or add some honey and rock sugar to increase the sweetness before cooking, so as to remedy the taste of citron tea to some extent.

4. But if citron tea suffers from deterioration, it can't be eaten. However, in addition to bitter taste, the deterioration of citron tea will be accompanied by obvious deterioration phenomena, such as sour taste, wine taste, or bubbles and texture erosion. It is best to observe more before eating to avoid eating spoiled food by mistake.