Sorry, I meant the nylon and glass stems. The nylon stem produces the most vapir. The glass direct draw stem produces a very very very small amount. I have also tried the long 14mm GonG stem, doesn't vape it at all. I'm not getting anywhere near those clouds with a bong or hitting it dry. Also, the material is VERY light brown. Not like it should be at all. I have left it on for over 24 hours now.This NonG stem?
http://underdogvapes.com/vape-stems/nong
If so, you might be packing it too tight. How big of a piece are you hitting it through? Is it possible to post a pic of your material?
I get clouds like @paytonpenn
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