It's essential you prepare your herbs with a grinder for vaporizing. Breaking up the herbs increases the surface area exposed to heat, allowing vaporization to happen easier. Ground herb also fills vaporizer chambers completely. But it's important that the herbs not be crushed into a mass that doesn't let the heating air through.
Our original grinder design features an arrangement of "thin-wall" teeth that split the herbs instead of crushing them while they cut. The thin teeth and knurled edges allow for easy turning.