Remember 10-15 yrs ago when you were taught (by your stylist) that if you’re using a professional shampoo that “you only need to use a little bit” because it’s so concentrated? Yeah, I said the same thing to my clients. Let me tell you what’s changed from then till now: 1. People are going much longer between washes. Back then almost everyone washed their hair daily. 2. When we said “just a little” we were comparing it to the handfuls of Pert Plus and Herbal Essences they were using not…