Hello Dersu,
Welcome to the Nexus. Thank you for taking the time to submit an Introductory Essay,
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Yeah, there is a distinct and significant learning curve that comes with vaporizing DMT correctly. And the GVG has a learning curve of it's own. I recommend using six (6) or more screens in your GVG - the crisscross mesh of the screens catches the melted DMT and saves it for future hits - it is not lost this way.
In terms of the GVG, my best advice is make love to it, don't f**k it. Exhale the air in your lungs and light your torch. While inhaling very slowly and gently, apply the torch gently to the ceramic plug of the pipe. While continuing to inhale, begin to move the flame in rapid little circles over the ceramic plug and also move it up and down so that it is not constantly in contact with the ceramic plug.
As you begin to see the tube of the pipe fill with visible vapor stop. Now exhale deeply and repeat the above procedure. This should give profound effects in a hit or two if not a deep breakthrough. Remember, the slower you inhale, the deeper a hit you will take.
Here is a link to the Preparations and Methods of Administration part of the forum. I'd recommend looking specifically at the Smoking an Changa links. Changa works great in my GVG. Welcome to the DMT-Nexus .
I hope this helps and that you will keep us posted. Again, welcome to the Nexus.