I use this trimmer. And trim them dry. It takes off some but not much more than my hands and scissors do. And there is minimal leaf left on the buds. Some people use it with wet buds but you have to leave it in longer and beat it up more. I use it with dry nugs and it wipes the stuff of nicely.
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This nug was trimmed in the above machine.
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Imo there is still plenty left on it and it cut 75% of my trim time. Zoom in On the pic, im not the best phone camera man but you can see its coated still.