Simply put - this is junk. I have tried many different amounts of coffee, and many different grind settings...but nothing works. Put the right amount coffee for sufficient flavor, you'll make a mess of the Keurig machine. Put less coffee to avoid a mess, you get weak coffee. Find Grind, Medium Grind....neither works....Not worth the effort, poor design, messy....toss this in the trash with your used K-cups, because that's where it belongs.