I recently purchased this (10/30) and used it only once. How to use Artime Smooth Miracle Oil Serum: Take 1-3 pumps in your hand and spread evenly from the middle of your hair to the ends. Do not rinse, and style as usual. ■ Product Description 【Unique technology that combines squalane & OMEGA-9 to pursue hair smoothness】 Wella, with over 140 years of history as a hair specialist, has developed its own technology that combines squalane and OMEGA-9. The special combination of squalane, which moisturizes hair and gives it a soft and smooth texture, and OMEGA-9, which supports the protective barrier on the hair's surface, instantly leads to smooth, shiny hair and controls frizz and waviness all day long. Squalane (hair protection ingredient) Formulated with squalane, equivalent to that generally used in skincare, it closes the cuticles on the hair surface, making it smooth, and creates a protective barrier, moisturizing the hair and giving it a soft and smooth texture. OMEGA-9 (oleic acid: hair protection ingredient) Coats the surface of the cuticle and acts on the outside of the hair fibers. Lipids identical to the fatty acids contained in the hair penetrate between the cuticles and replenish lipids, supporting the hair's protective function.