Before use, apply the stretching spray to the area of the shoe to be treated: it softens and prepares the leather, making stretching easier. Choose the form in the size corresponding to the shoe, men's, women's or children's, and fit it on the machine, then insert the shoe, centring it well. If you need to work on a precise spot, apply the bunion plugs at the area to be widened. Operate the machine gradually until you feel slight tension on the material, without forcing, as excessive stretching could damage the shoe. Leave the shoe under tension for the necessary time, then loosen and carefully remove it. Try it on and, if necessary, repeat the operation, increasing the stretch a little at a time. Proceed with particular care on delicate materials, such as thin leather or patent leather.