There are a few things you can do to get a lot of kief out of your grinder. The first is to make sure that your grinder is clean. Any build up of plant material will prevent the kief from falling through the holes in the grinder and being collected in the bottom chamber. You can clean your grinder with a brush or by soaking it in rubbing alcohol.
The second thing you can do is to grind your cannabis slowly and carefully. If you grind too quickly, the kief will be blown away and lost. Take your time grinding and be gentle with the cannabis so that as much kief as possible falls through the holes in the grinder.
The third thing you can do is to tap the side of the grinder while it’s open so that any loose kief falls down into the bottom chamber. You may need to do this several times during grinding to get all of the kief out of the nooks and crannies of your grinder.
Once you have finished grinding, empty the bottom chamber of your grinder and enjoy your bounty of kief!