Thank you, Heather
It could very well be baking soda that wasn't rinsed out. The green thing definitely mold, though, the smell was unmistakeable, and well, it was green! :-/ Yup, hard water here too.
Sometimes some cutting is a very good solution, as you have experienced also I'm glad you don't have discomfort anymore - 3" is a lot of hair to be pulled on and hurt None of mine were particularly painful at any point, and they're all rather small at the roots (all 68 or so).
updated by @sissemor: 07/22/15 06:33:17AM