It is best to remove the loose debris after every use with a soft brush (super easy and fast).
Regularly clean the mill to maintain a smooth function. Don’t wait too long between cleanings.

Regular cleaning will keep your grinder in top shape and will ensure the best experience.

First, disassemble your grinder completely and remove all seals. 

Regular cleaning (light soiling)
It is best to remove the loose particles inside the grinding chamber with a soft brush after every use. Remove the grater disc and clean the anti-rotation features (holes). If there is adherence left, use a soft cloth/paper towel. Dip the cloth in water, wring the cloth nearly dry and wipe the area clean. Finally, dry it using a soft, clean cloth. Alternatively, apply a little bit of isopropanol/isopropyl (70%-99%) on a soft cloth/paper towel or use alcohol cleaning wipes and carefully wipe off the adherence. Don’t scrape resin residue off the wooden parts to avoid any damage. Don’t soak the wood parts in Isopropanol!

Medium-heavy cleaning ( medium-heavy soiling)
If you don’t clean your grinder regularly, resin residue will likely build up on the side walls of the wooden parts. In this case, take your time with the cleaning. Apply some isopropanol/isopropyl (70%-99%) on a soft cloth/paper towel or use an alcohol cleaning wipe and carefully wipe the adherence. Finally, dry it using a soft, clean cloth. Don’t scrape resin residue off the wooden parts to avoid damaging them. Don’t soak the wood parts in Isopropanol!

When your Stona grinder feels a little bit dry or has lost its shine, it may be time to apply wood wax. 
We recommend applying natural food-grade wax to the whole surface 1-2 times a year. 

Clean your grinder. Ensure that the surface is completely dry and free of dirt or loose debris.

Wax keeps your grinder looking shiny and new and provides a layer of protection that helps reduce friction and keeps the function smooth.

Disassemble the wooden parts and remove the seals.
Use wax/wood balm to treat and finish your grinder. Apply a thin coat of wax to the surface using a soft cotton cloth, soft kitchen paper towel or just your bare fingers. Don’t apply wax to the grooves of the seals. If the wax gets in the grooves, remove it with a dry cloth. Let it sit for about 30 minutes or until the shine has diminished. Remove all excess wax with a soft cotton cloth or kitchen paper towel and let the wax dry overnight. Apply a second layer and repeat the steps mentioned above.

Extra step for our wood enthusiasts: After the final coat of wax has dried overnight, you can polish the wood by hand or with a polishing machine. We recommend using a lamb's wool pad and polishing until all the streaking has been removed and the sheen is even.