Your color clients all have one giant thing in common—after a major haircolor shift, they always ask the same question, “How do I get my color to last longer?” And you always tell them that blow-drying on high heat, hot water, chlorine and thermal styling tools are destroying their beautiful color (and all your hard work!). Guy Tang knows this all too well, so in his newest YouTube video, he and fellow stylist Nora Ali Ahmad set out to help educate your color clients on just how important it is to turn their irons down so that their…