(Photo by: Gina Coleman/Weedmaps) Multi-chambered grinders typically have a mesh screen across the bottom of the catching. The screen filters out the chunks of plant matter from the much finer, powdery kief , which falls through the screen and into a kief catcher. Some grinders have multiple screens to separate out the super fine grains of kief from the larger grains of kief. Either way, these multi-chambered grinders allow you to isolate and keep the cannabinoid-rich kief for future use. Finally, some weed grinders use rotating blades rather than grinding teeth.
These grinders can produce a more uniform final product, as the blades cleanly slice the herb rather than forcefully grinding it apart into small chunks. The problem with grinders is that they eventually get gunked up with small pieces of plant matter, powdery kief, and sticky resin . When this happens, the lid can get stuck and difficult to work with, and it can be a challenge to rotate the grinding teeth or cutting blades back and forth. When this happens, it’s time to clean your grinder. Here’s everything you’ll need to get your grinder into like-new condition: (Photo by: Gina Coleman/Weedmaps) Your dirty grinder A toothpick A small, soft-bristled brush A freezer A plate or bowl Isopropyl alcohol A toothbrush or some other type of stiff brush A Ziploc bag or glass jar Clean water A towel. The first way is faster and simpler but won’t allow you to save the plant material leftover in the grinder. The second way takes a bit longer and requires some extra steps but will let you harvest some potentially potent residue for future use. Begin by taking apart and separating each chamber of your grinder. At this point, you can quickly harvest a little bit of leftover plant material by dumping out and saving as much of the loose leftovers as you can.
Disassemble the Dirty Grinder (Photo by: Gina Coleman/Weedmaps) Step 2: Soak the Grinder in Alcohol. Place the grinder into a container of some sort—a Ziploc bag or large glass jar work best. Fill the container with enough isopropyl alcohol to fully submerge all parts of the grinder. Let the grinder soak for 20-30 minutes and agitate the container every once in awhile to help break apart plant residue. Soak the Grinder in Alcohol (Photo by: Gina Coleman/Weedmaps) Step 3: Scrub the Grinder. Pour out the alcohol and use a stiff-bristled brush to scrub your grinder. Don’t forget to wash each chamber, scrape along the grinding teeth, and scour the lids. Scrub the Grinder (Photo by: Gina Coleman/Weedmaps) Step 4: Rinse and Dry the Grinder. Use clean warm water to rinse your grinder thoroughly. Be sure to wash away all alcohol and any remaining plant material. Once the grinder is completely dry, you’re ready to start grinding again. Rinse and Dry the Grinder (Photo by: Gina Coleman/Weedmaps) Method 2: Deep Clean Your Grinder. If your grinder is so clogged up with plant residue that it’s hard to get a smooth back-and-forth grinding or slicing motion, it’s time to deep clean it. Start by disassembling the grinder and removing each chamber from the others. As you do this, be careful that you don’t spill any of the plant matter that’s left over inside the chambers. Disassemble the Dirty Grinder (Photo by: Gina Coleman/Weedmaps) Step 2: Dump Out Residue. Dump out leftover plant matter onto a plate or into a bowl. At this point, you’re simply trying to harvest the stuff that’s only loosely caked into the grinder; don’t worry about the material still clinging to the chambers of your grinder. Dump Out Residue (Photo by: Gina Coleman/Weedmaps) Step 2: Freeze the Grinder. Arrange each piece of the grinder to sit upright inside the freezer. Leave the grinder in the freezer for at least 30 minutes. Freezing the plant residue this way makes it stiffer and, as it freezes, it will start forming into small clumps rather than clinging tightly to the grinder, all of which simplifies the scraping of the residue out of the grinder. Freeze the Grinder (Photo by: Gina Coleman/Weedmaps) Step 3: Harvest Plant Residue. Use a toothpick and small soft-bristled brush to gently scrape away as much of the plant material as you can. As before, use your plate or bowl to collect everything.
Remember to scrape around the edges of all the chambers, along the sides of the grinding teeth, and around the circumference of each chamber’s lid. Most of this plant residue—especially the powdery kief—is incredibly rich in cannabinoids and very potent, so be sure you keep everything you harvest for future use. Harvest Plant Residue (Photo by: Gina Coleman/Weedmaps) Step 4: Soak in Alcohol. When you’re satisfied that you’ve harvested as much of the leftover plant material as you possibly can, it’s time to make your grinder spotless. Place each chamber inside a large Ziploc bag or a glass jar. Fill the container with enough isopropyl alcohol to fully submerge the grinder. Every once in a while, give the container a gentle swirl to help break apart any plant matter stuck to the grinder. Soak in Alcohol (Photo by: Gina Coleman/Weedmaps) Step 5: Clean Off Remaining Residue. Pour out the alcohol and remove the grinder from the container. Use a toothbrush or another stiff brush to scrub your grinder clean.
In this step, you’ll get rid of the most tenacious residue—the stuff that’s really gunking up your grinder and making it hard to use. Clean Off Remaining Residue (Photo by: Gina Coleman/Weedmaps) Step 6: Rinse and Dry.