My hair is coloured, I have tried various products but really struggling to get nice shiny hair? It's kind of a bit.... dull? I have a great hairdresser and a good cut so it isn't that. I need to use shampoo and conditioner that won't leave a build up but protects the colour? I must use a heat protector too. Any suggestions?? What have you found that works? I can't dry my hair like the hairdresser does on myself which doesn't help!