One sees on this forum and else where admonitions not to use herb that's shown powder mildew. It is a problem for your plants naturally, plants are a host for it. It has evolved to attach to its plant hosts not humans. I've never lost a plant or even a significant portion infected in my outside grows. When I consume the herb that has been dried, cured and heated to vape or make edibles. The mildew, in my experience, is not a problem. Doesn't the product of your hard work deserve a bit of research and thinking before you dump the lot of it?