How to Clean a Garbage Disposal
Deep clean and deodorize your kitchen garbage disposal by scrubbing the splash guard, scouring the grinding chamber with ice, and sanitizing with citrus.
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🧰 Required Tools & Equipment
- ✓ Old toothbrush or small scrub brush
- ✓ Rubber gloves
- ✓ Flashlight
- ✓ Tongs or pliers
📦 Materials & Supplies
- ✓ Baking soda
- ✓ Distilled white vinegar
- ✓ Ice cubes (2 cups)
- ✓ Coarse rock salt or kosher salt (1/2 cup)
- ✓ Lemon or lime wedges
- ✓ Liquid dish soap
⚠️ Safety Checkpoints & Warnings
- • Verify the disposal switch is turned OFF and unplugged under the sink before inserting any tools or hands near the opening.
- • Never insert bare fingers or hands directly into the grinding chamber; always use tongs to retrieve objects.
- • Keep hands and tools clear of the drain opening when the disposal motor is switched on.
📋 Step-by-Step Guide (5 Steps)
Disconnect Power and Inspect Chamber
Ensure the disposal wall switch is OFF and unplug the power cord beneath the sink or trip the breaker. Shine a flashlight down the drain and use tongs to remove any trapped foreign debris, bones, or silverware.
- • Power cord unplugged beneath the sink
- • Grinding chamber is visibly clear of foreign objects when illuminated
- • Reaching into the drain with bare hands instead of tongs
Scrub the Rubber Splash Guard
Apply dish soap to an old toothbrush. Lift each flap of the rubber splash guard and vigorously scrub the underside where black slime and food residue accumulate.
- • Black residue removed from the underside of all rubber flaps
- • Underside of the baffle matches the original rubber color
- • Only cleaning the top surface of the splash guard and missing the underside folds
Apply Baking Soda and Vinegar Fizz
Pour 1/2 cup of baking soda directly down the drain into the disposal chamber. Pour 1 cup of white vinegar on top and allow the bubbling mixture to sit for 10 minutes to break down grease.
- • Thick white foam rising up through the rubber splash guard
- • Foam settling after several minutes of contact time
- • Flushing the mixture immediately with water before it has time to dissolve buildup
Scour Blades with Ice and Rock Salt
Reconnect the disposal power. Fill the disposal hopper with 2 cups of ice cubes and 1/2 cup of coarse salt. Turn on a cold water trickle, switch on the disposal, and run until all ice is fully crushed.
- • Ice cubes completely ground down
- • Grinding sound changes from loud rattling to a smooth hum
- • Using hot water instead of cold, which melts the ice before it scours the blades
Deodorize with Citrus Peels
Cut a lemon or lime into small wedges. Drop the wedges into the disposal, run a moderate stream of cold water, and run the disposal for 30 seconds until the peels are ground and the scent is fresh.
- • Citrus peels fully processed through the drain
- • Clean water draining freely with no backing up
- • Dropping a whole un-cut lemon into the hopper, which can jam the mechanism
Credit: inspired by an original tutorial by Roto-Rooter — watch the original on YouTube.
Don’t have everything?
- No Old toothbrush? Bottle brush or dish wand
- No Rock salt? Standard table salt or coarse kosher salt
- No Fresh lemon or lime? Orange peels or 2 tablespoons of bottled lemon juice