I want to pick up a bottle clarifying shampoo tomorrow but I'm worried about it stripping my hair color...what's the best stuff out there? I don't want my color to fade but I feel like I currently have build up from using Redken Soft and Biolage Shampoo for color treated hair. It feels sticky! Has anyone tried the Frederic Fekkai Apple Cider Clarifying Shampoo on colored hair? Thanks!