Using the Kryolan Vitacolor foundation is easy. First, clean and moisturize your face. Then, squeeze a small amount of the foundation onto your fingertips or a makeup brush. Apply it evenly across your face, starting from the center and working your way out. After application, use a powder puff to apply the Translucent Powder to set the foundation and make it last longer. Remember, the colors on the chart might be a bit different from the real product, so choose your shade carefully. As for maintenance, keep the tube in a cool, dry place. Make sure the cap is tightly closed after each use to prevent the foundation from drying out. And always check the expiration date to ensure the best performance of the product.