Disposal emits a strong rotten or sewer-like odor from the sink opening.

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

• Clean splash guard: If your American Standard model has a removable rubber splash guard, pull it out and scrub both sides with hot soapy water and a brush. If non-removable, scrub in place with a long-handled brush.
• Scrub chamber: With power OFF, use a disposal-safe brush and hot soapy water to clean the inside walls and underside of the splash guard.
• Deodorize naturally: Pour 1/2 cup baking soda into the disposal, followed by 1 cup white vinegar. Let it foam for 5–10 minutes, then flush with hot water.
• Ice and citrus flush: Run a tray of ice cubes and a few small citrus peels through the disposal with cold water to help scour the grinding components.
• Clean drain trap: If odors persist, remove and clean the P-trap and horizontal drain arm to eliminate sludge.