@Captain80s @RichardKuklinskisIcyGlare @d0c40r0 @Frondeur @brendamccann Yeah they use butane (BHO) or some other solvent to basically distill everything out of the weed flower and then it dries into "oil". That's the theory at least. You are supposed to vent it and possibly do a very controlled low temp heating to get all of the residual butane out, which I think is a failure point for a lot of this and sometimes people end up causing big fires from the butane + heat.