I used to do the coin thing for years Actually used a coin to clean my grinder screen today Pretty much have stopped since I've grown my own and don't really have a shortage of kief anymore. But the reason you get so much more from the coin is because you're breaking leaves with the coin and they're falling through the screen. That's why it won't press or melt Take a look at it through a loupe or scope. It looks like less in volume without the coin but it's a lot more trichomes to plant matterI threw a couple buds in the freezer about 10 minutes ago, should be ready to grind in another 5 minutes. You guys do the coin trick with your grinders? Keep a nickel in the ground weed chamber, put the grinder in the freezer for 15 minutes or more, and then shake the shit out of it, get a shitload of Keif fast.