Who is applying it to their scalp? And just because it's called cowashing doesn't mean it qualifies as actually washing the hair. I know that all of us have varying wash schedules, but we are all consistently saying to remove product buildup as often as possible.
I understand that not everything works for everyone, but when you speak as if you know it all. I find it a bit strange. Also hair and skin are very different, so that not washing your arse for 30 days logic and likening it to cowashing is a bad example.