In this video you will see coloured DaisyClay that has been kept too long. The clay is tough and has lost its smooth properties. Add a few drops of water to the clay and knead well to get back its lost properties. When the clay sticks to your fingers after adding water then rub little Pond's Cream to your fingers and knead it well into the clay. As you can see the clay is smooth again and can be rolled in the pasta machine to get a thin sheet. Notice when working with vein stamps the clay takes on a pattern well. See also how the clay can be manipulated again with tools and retaining its shape.
Repairing can not be done unlimited and should only be done once or twice.