I'm a bit of a fan of Tea Tree oil products. I had been a long time user of
Paul Mitchel, but after a long term leave from tea tree oil, I came back. But I'm using products from the brand
Holista. If I am not mistaken, they are out of Vancouver, Canada. I find it just as good as Paul Mitchel, but a bit less pricey ( not that PM is that expensive).
I did purchase a small book on tea tree oil and its usage :
http://www.amazon.com/Tree-Health-We...9184891&sr=8-1
It is an OK reference guide.
Just like the rest of you , I do love that tingle

. Not to mention its better for my hair and body than anything else I've tried