how to store grapes after you buy them
Washing them and then storing them in the refrigerator may allow bacteria to grow and rot to set in. Before you begin, first wash your hands so that any bacteria or dirt on your hands is not transferred onto the grapes you are cleaning. Place grapes in a colander or hold them in your hand. Wash them under cool water. Remove any grapes that are broken open or show signs of mold or rot. If you are canning or freezing the grapes, select only the healthiest looking grapes for preservation.