how to be a poker grinder

how do i use my keif/keef/pollinator grinder?
like the guy told me the basic concept but im worried that evrey time i dump the rest of the hash ou that im dumping the keef out because like if the crystals can fall to the bottom through the screen whats stopping them from falling back out with the rest of the green.
its that little red poker chip grinder.
Not many people know about these, including myself, so if you’re looking for a real answer to this question, I’d try talking to the professionals. The more specific you are on here, the less likely you’ll get an answer.
AllVegasPoker.com Interviews Sevencard2003 (Tony Big Charles) – Las Vegas Poker Player Grinder