I've vaped over 12 types of weed in the Volcano and I can truly say that the herb can make a big difference.

Wet herb is worse - dry herb is better. Whoever suggested 'misting' the weed doesn't have a Volcano.

If the weed is ground well it will vape well.

If you have a grinder with a kif/crystal collecter - try vaping the crystals only.

You can breath the vapour BACK into the bag - do this to recycle a little more