i had been saving my stems for about 4 years and i had two sandwich bags filled completly with stems, im talking pounds of bud worth of stems all high quility, i relaly didnt think that i ha anyhting worth much but one day when i coulnt get bud i took one of the bags and emptied it out on a larg book i have that surface has a texture that lets the keif get caught in it but not the stems and qaafter taking handfuls of he stems and grindding them together in my hand over the book then taking a playing card and scrapin the stems across the book a few times llowing all the keif to fall on the book then collecting that and i would have to do that procces a lot for about a half hour but i ended up with literly 4 grams of straight up high quility keif and i still have another bag. i had no idea the potential of what i had