I'm having troubles following what you're saying, but from what i can gather... you've tried different temperatures with your herbalaire vaporizer. On either setting you're not getting the desired effects. Your desired effects though are that of what you would get from incense?
I'm not sure i follow. You fill the bag but all you see is a darkish spiderweb cloud??? Isn't that what vapor is? The material turns a darkish brown and amber because it's being vaporized.. it's supposed to look this colour.

I know lots of people that are very happy with their herbalaire's however, if you feel the need to try and get your money back.. that's all you.

Good luck,
Bob. :rasta: