1. This is a normal phenomenon, because the plant is still active and needs gas exchange, and the layer of fluff that we see with the naked eye is the one that mushrooms use to exchange with the outside world. After the plant leaves the mother plant, the intensity of respiration will increase, so a lot of white fluff will grow on its surface.
If you find this kind of situation, don't worry. It's a normal phenomenon. First of all, you need to judge how long the mushrooms have been put on and whether they have rotted. If they are still fresh, just burn them with boiling water. If it's very serious, it's not recommended to continue to eat it. For example, if it's broken in a touch or the surface turns black, it means it's gone bad. You can't eat it.
If you don't want to let the small fluff grow on its surface, we can boil the fresh mushrooms with boiling water, then soak them in cold water for a while, filter the water and put it into a fresh-keeping bag, then seal the mouth and put it into the refrigerator for freezing, which will avoid but also affect the taste of the vegetables. It's recommended to eat it while it's fresh. There will be no problem
