You can't. According to the food street APP, potato skins are peeled directly with sand, which will leave sand during cooking, which does not meet the hygiene requirements of food.

1. First, fish out the potatoes, clean the sediment on the surface with clear water, prepare a steel ball for washing the pot, and rub the potato surface repeatedly with the steel ball. At this time, most of the potato skins can fall off, which is very convenient and saves time and effort.

You can also soak the washed potatoes in a pot full of boiling water for about five minutes. Note that boiling water needs to submerge potatoes, and then take them out and scrape them off gently with a knife, so it is easy to scrape them off.