It mushes from stop starts (static coefficient of friction). I get my electrical trimmer whirring and dump in my buds and they roll quickly without 'mushing' for me anyway LOL ymmv. You want it quick enough the sticky doesn't keep sticking to the metal screen and tearing them apart. So a brisk turning that never stops then open the discharge chute. It's not at all intuitive and took me a bit to get it down.
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All my larf goes into a bag in the freezer for bubble hash, then I press it.