KitchenAid KCDC250 Use And Care Manual page 6

USE
ENERGY
WISELY
CARE AND
CLEANING
A CAUTION
Product Damage Hazard
NEVER use chemical or solvent drain compounds in the disposer. They can
cause serious damage and are unnecessary if the disposer is operated
according to the above instructions.
Your KitchenAid disposer is permanently lubricated and will never need additional
lubrication.