Persistent foul odor from disposal even after running water and grinding ice

Safety first: Turn off the disposal at the switch. Do not use harsh chemical drain cleaners.

• Clean the splash guard (baffle): Many InSinkErator models have a removable Quiet Collar® sink baffle. Pull it out and scrub both sides with hot soapy water and a brush. For fixed baffles, scrub in place.
• Flush the chamber: Fill the sink halfway with warm water mixed with a small amount of dish soap. Remove the stopper and run the disposal to flush.
• Deep clean: Grind a tray of ice cubes with a cup of rock salt or baking soda to scour the grind chamber. Follow with a rinse of hot water and a small amount of vinegar, then flush thoroughly.
• Clean discharge piping: If odor persists, remove and clean the P-trap and discharge elbow to remove sludge.