Honestly I’ve tried every method you can imagine, from the Yocan Evolve to GVG. A one hitter sandwiched between a little weed is my go to, and seems to be highly efficient.
If you get an acrid nasty taste when you take the hit, you’re burning it.
If you use something like the Yocan, get a base layer of cannabis oil in there first or it will burn the DMT.
This is why people get stronger effects with orange waxy DMT, the plant oils help protect and improve vaporization.
-GC