There is no one definitive answer to this question, as the use of a dematting tool will vary depending on the dog's coat type, size, and shape. However, general tips for using a dematting tool include:- Wiping the dog's coat down completely with a clean cloth or paper towel- Rubbing the tool over the entire coat, starting at the front and working back- Gently moving the tool back and forth over the coat, making sure to avoid any sensitive areas- Refrigerating the tool for at least two hours before using