For best results and ideal application, you first need to identify the lightest shade of your hair. For example, if you have vivid highlights or streaks on blonde hair, use a blonde gloss. A blonde gloss is also recommended if you have black hair and blonde highlights, as it refreshes your highlight and provides shine on your black hair. If you would like to refresh mainly dark hair, you can use John Frieda® Colour Refreshing Gloss Cool Brunette. In that case, your highlight may become slightly darker and bluish. If your highlights become too dark, stop using this brunette hair gloss. Then wash hair with your regular shampoo or a clarifying shampoo. The colour deposit from the gloss will wash out over time if you discontinue use.