1, add a proper amount of water to the basin, then add a spoonful of flour (common flour, steamed bread flour, jiaozi flour) and mix well.

2. Let the flour and water mix evenly. After standing for 2 minutes, hold the handle of the grape with your hand and swing it gently in the water.

When the flour water becomes turbid, the grapes will be washed clean. Take out the grapes and rinse them with water, then you can eat them safely.