I'm mid 40s with shoulder length hair that I home dye every 4 weeks and get cut every 3 months. My hair is quite thick and straight but a bit dull, dry and frizzy at the ends. I've used Aussie serum for coloured hair for few years and I feel that it isn't working any longer so could do with recommendations for a hair product which will make my hair a bit less "middle-aged". I used SLS and silicone free shampoos as I get eczma.