Use the burr care fluid once in a while so that your Comandante grinder works properly. Apply a small amount of fuid to the cloth and rub onto the intended steel surface. Use our Brstle #5 brush to clean the steel surface and remove oxidative residue. Wipe away any excess with the cotton cloth. For maximum efect, only use on a dry steel surface.Do not use the Burr Care Fluid and Brstle #5 on any wooden parts!