High quality Cannabis will clean your grinder, from the alkene and alcohol solvents. Not saying your bud is bad. But it's B grade if it doesn't clean a grinder.
Cone head buds are under fed. You don't want that. Calyx clusters form together as round clumps. When the circle gets small quick, that's because the 2nd half of your bud ran out of nutes.
High quality Cannabis will clean your grinder, from the alkene and alcohol solvents. Not saying your bud is bad. But it's B grade if it doesn't clean a grinder.