Matrix Biolage ScalpSync Cooling Mint Shampoo

I have a fairly sensitive scalp of my own, it starts to itch quickly when there are too many innatural substances in the shampoo. When I discovered matrix, I was really happy, this shampoo cools your scalp and you don't have to use much of it. I have less itching and sincerely prefer to use it. I use it sometimes for 3 to 4 months, because I only use small bits. How do I use it? Step 1: first in damp hair a little bit, let it soak and rinse Step 2: just a little bit and then let it go a little longer, then it foams more and feel when it's right the coin does its job. Then rinse and you're ready!