How to Clean Garbage Disposal
NEVER put your hand inside a garbage disposal. Use tongs or pliers to remove stuck items. Even when powered off, the blades are sharp.
What You'll Need
- 2 cups
- 1 cup
- 1/2 cup
- 1 cup
- 1, cut into wedges
- Running tap
Step-by-Step Method
Pour 2 cups of ice cubes and 1 cup of coarse salt into the disposal. Run the disposal with cold water for 30 seconds. The ice and salt scrub the grinding chamber walls and blades clean.
Turn off the disposal. Pour 1/2 cup baking soda into the drain, followed by 1 cup white vinegar. Let it fizz for 5 minutes with the disposal off.
After the fizzing stops, run hot water down the drain for 30 seconds to flush out the loosened debris.
Drop lemon or lime wedges into the disposal. Run the disposal with cold water until the citrus is fully ground. This deodorizes and leaves a fresh scent.
The rubber splash guard (the black flaps at the drain opening) traps food and bacteria underneath. Lift each flap and scrub the underside with an old toothbrush and dish soap.
- Never put your hand inside a garbage disposal (even when off)
- Never use bleach in a garbage disposal (damages the rubber seals and metal components)
- Do not pour hot water while running the disposal (melts grease into the drain line)
- Never put fibrous foods (celery, corn husks, artichokes) in the disposal (wraps around the blades)
- Run the disposal every few days even if you have nothing to grind. Standing water and inactivity promote odor and corrosion.
- Always run cold water for 15 seconds after turning off the disposal to flush all debris through the drain line.
- Frozen vinegar ice cubes (vinegar poured into an ice tray) combine the scrubbing and deodorizing steps into one.
Frequently Asked Questions
Food particles trapped under the splash guard and on the grinding chamber walls decompose and create odor. The ice/salt scrub cleans the chamber, and scrubbing the splash guard underside eliminates the most common odor source. Regular cleaning every 2 weeks prevents buildup.
There is a common myth that eggshells sharpen disposal blades. They do not (disposals have impellers, not blades). Eggshells are not harmful in small amounts, but the membrane lining can wrap around the grinding mechanism. It is better to compost them.
Sources & Methodology
Ice scrub method works by freezing grease deposits on chamber walls so they chip off. Coarse salt provides abrasive scrubbing action. Citric acid from lemons provides additional deodorizing and mild antibacterial action.
Last reviewed: March 20, 2026