How to Clean a Garbage Disposal (and Fix One That Won't Work)
By Mike Holt, NJ Master Plumber · May 9, 2024 · 3 min read · Updated November 1, 2026
Quick answer
Turn the disposal off and unplug it, scrub the rubber splash guard, then grind a handful of ice cubes with coarse salt under cold running water. For odors, follow with baking soda and vinegar, rinse, and grind a few lemon peels. Never put your hand inside the disposal.
- Difficulty
- Simple. Keep your hands out and the power disconnected
- Time
- 15 minutes
- You need
- Ice, coarse salt, baking soda, vinegar, scrub brush, tongs
Rather not risk it? A licensed plumber can handle this for you, with written upfront flat-rate pricing options before any work starts.
A garbage disposal stays cleaner with a quick cleaning every couple of weeks. Much of the bad smell comes from food stuck under the rubber splash guard, and many "broken" disposals are only jammed or tripped. Here's how to handle both safely.
How to clean a garbage disposal
Step 1: Turn it off and unplug it

Switch the disposal off at the wall switch, then unplug it under the sink or turn off its breaker. Never put your hand inside a disposal, even when it's off. Use tongs or pliers to pull anything out.
Step 2: Scrub the splash guard

Lift the flaps of the black rubber splash guard and scrub the underside with an old toothbrush or bottle brush and a little dish soap. This is where most of the smell comes from. If your guard lifts out, take it out and wash it in the sink.
Step 3: Grind ice and salt

Plug the disposal back in. Drop in about two cups of ice and half a cup of coarse salt. Run cold water and turn the disposal on until the grinding stops. The ice and salt scour buildup off the grinding parts.
Step 4: Deodorize with baking soda and vinegar

With the disposal off, pour in half a cup of baking soda, then a cup of white vinegar. Let it fizz for 10 minutes, then flush with hot tap water while you run the disposal for a few seconds.
Step 5: Finish with citrus peels

Grind a few lemon, lime or orange peels with cold water running. It freshens the smell. Then rinse for 15 seconds.
Skip bleach and chemical drain cleaners. They're hard on the disposal's seals and on older pipes.
Garbage disposal not working? Try this first
Step 1: It's silent: press the reset button

Turn the switch off. Find the small red button on the bottom of the unit and press it until it clicks. Wait a few minutes if the motor feels hot. Turn the water and switch back on. Still silent? Check that it's plugged in and look at the breaker status. If the breaker or outlet has tripped, call us.
Step 2: It hums but won't turn: free the jam

Disconnect the power first: turn it off and unplug it, or switch off the breaker if it's hard-wired. Put a 1/4-inch hex key (Allen wrench) in the socket in the center of the bottom of the disposal. Many disposals come with one. Work it back and forth until it turns a full circle freely. Shine a flashlight in from the top and pull out anything stuck with tongs. Never use your hand.
Step 3: Reset and test
Press the reset button, plug it back in, run cold water and turn it on. If it runs normally, you're done.
When to repair or replace it
If the disposal leaks from the bottom, keeps tripping its reset button, or hums even after you free it, the motor or seals are worn out. Replacing it is usually the better value than repairing it. We install and replace garbage disposals. Written upfront flat-rate pricing options. You choose. See our garbage disposal page, or call 908-873-6686.
If the sink backs up even when the disposal runs fine, the clog is in the drain pipe. That's a drain cleaning job.
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Stop and call us if
- It leaks from the bottom or from the pipe connections.
- It hums and won't turn even after you free it with the hex key.
- The reset button keeps popping out, or the breaker has tripped.
- Water backs up into the sink even with the disposal running.
Call 908-873-6686.









