To begin, ensure your hair is clean and damp. Shake the bottle well before use. Spray the lightener directly onto your hair, focusing on specific strands for highlights or all over for an overall brighter look. Make sure to saturate the hair evenly for consistent results. Once applied, expose your hair to sunlight. The more sun exposure, the more prominent the lightening effect will be. You can rinse your hair after sun exposure or leave it in, depending on your preference. For optimal hair health, always follow up with a good conditioner or a deep conditioning treatment, especially after prolonged sun exposure, as lightening can sometimes lead to dryness. This lightener is compatible with natural light to dark blonde hair. It is not recommended for use on chemically treated or very dark hair without first performing a strand test. Store the product in a cool, dry place away from direct sunlight.