For Oysters, Lion's Mane, Nameko, Chestnut, and Pioppino, you can usually just twist the mushroom clusters from the kit. Hold the cluster near the base and spin them. If you'd rather use a knife and cut them, that's fine too! For Shiitake, it's easiest to use clippers or scissors. Cut at the base of the stem. Clean off any loose bits from the kit before continuing to spray and cut off any bits of sawdust from the block on your mushrooms before cooking and eating them.