Herb grinders have special screens that help users gather kief without even knowing it. Upgrading to a kief grinder could add potency to your sessions.
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What is Kief: How to Collect & Use It?
Kief: Everything You Need To Know - Herbies
A highly concentrated of the cannabis plant is called kief.
What Is Kief? How to Collect and Use Kief
Kief FLUENT