Clean your InSinkErator with ice, salt, and hot water—no tools needed

An InSinkErator garbage disposal collects food scraps and grease that harden on the walls and grinding chamber. Over time, this buildup traps odors and slows the grind. The fastest way to clean it is to run ice cubes and rock salt through the unit while it spins—the ice scrapes the walls and the salt acts as an abrasive. This takes about five minutes and costs almost nothing.

If your InSinkErator smells but still grinds normally, ice and salt will fix it. If the unit is slow, jammed, or leaking, you may need to take it apart or call a plumber. This guide covers the cleaning methods you can do yourself and tells you when to stop and call someone.

Key Takeaways

  • Ice cubes and rock salt clean the grinding chamber and walls without chemicals or disassembly.
  • Baking soda and vinegar work for odors but take longer and are less effective at scraping buildup than ice.
  • Never put your hand down the drain or use a plunger—you risk the blades spinning unexpectedly.
  • If the disposal is jammed, leaking, or won't turn on, stop cleaning and call a plumber instead.
  • Regular cleaning after heavy use keeps odors and slowdowns from starting in the first place.

The ice and salt method: fastest and most effective

Fill a cup with ice cubes—regular ice from your freezer works fine. Pour the ice down the drain. Then sprinkle about half a cup of rock salt (the coarse kind used for de-icing) down after it. Do not use table salt; it dissolves too fast and won't scrape.

Turn on the cold water tap to a steady stream. Switch on the disposal and let it run for about 30 seconds. You will hear a loud grinding noise—that is the ice hitting the walls and the salt grinding against the buildup. Keep the water running while the disposal runs. After 30 seconds, turn off the disposal and let the water run for another 10 seconds to flush the loosened debris down the drain.

Repeat this cycle two or three times if the disposal smells strong or grinds slowly. Most odors and minor buildup clear after one or two cycles. The whole process takes five to ten minutes.

Using baking soda and vinegar for odors

If you don't have rock salt or prefer a gentler method, baking soda and vinegar work for odors, though they clean less aggressively than ice. Pour half a cup of baking soda down the drain. Follow it with one cup of white vinegar. The mixture will fizz and bubble—that is normal and helps break down grease.

Let it sit for 15 to 30 minutes without running the disposal. Then turn on the cold water and run the disposal for 10 to 15 seconds. Flush with water for another 10 seconds. This method is gentler on the unit but takes longer and does not scrape the walls as well as ice does.

You can also pour boiling water down the drain after the baking soda and vinegar sit, which helps dissolve grease. Let the water cool slightly before pouring so you don't crack the sink basin. Never pour boiling water directly onto a stainless steel sink—the sudden heat can cause permanent discoloration.

What not to do when cleaning

Never put your hand or fingers down the drain while the disposal is plugged in, even if it is off. The unit can turn on unexpectedly, and the blades will cause serious injury. If something is stuck, use tongs or a wooden spoon to fish it out, keeping your hand well above the drain opening.

Do not use a plunger on a garbage disposal. The suction can damage the internal seals and cause leaks. Do not pour chemical drain cleaners down the disposal—they can corrode the metal chamber and are unnecessary for normal cleaning. Avoid putting fibrous foods like celery, corn husks, or onion skins down the disposal in the first place; they wrap around the blades and jam the unit.

Do not assume the disposal is off just because it is quiet. Always flip the wall switch to the off position and keep it off while you work near the drain. Some disposals have a reset button on the bottom of the unit; if the disposal suddenly stops working, press that button before calling a plumber.

When to stop cleaning and call a plumber

If the disposal makes a grinding noise but nothing comes out, something is jammed inside. Stop using it and call a plumber. Trying to force it by running it longer can burn out the motor or damage the blades.

If water backs up into the sink or pools around the base of the unit, the disposal is leaking. This usually means the seal between the disposal and the sink has failed, or the unit itself has cracked. A plumber will need to remove and replace it—this is not a cleaning problem.

If the disposal won't turn on at all, press the reset button on the bottom of the unit and try again. If it still does not turn on, the motor may have failed. Call a plumber or an electrician. If the disposal hums but the blades do not spin, the motor is running but the blades are stuck; this also requires professional help.

How often to clean your InSinkErator

If you use the disposal daily, run the ice and salt cycle once a week to prevent buildup. If you use it only a few times a week, clean it every two weeks. If you notice an odor or the disposal is grinding slowly, clean it right away instead of waiting.

After grinding tough foods or fatty scraps, run ice and salt when ready. This keeps grease from hardening on the walls overnight. A quick five-minute cleaning now prevents a smelly, slow disposal later.

Frequently Asked Questions

Can I use regular table salt instead of rock salt?

Table salt dissolves too quickly in water and won't scrape the walls effectively. Rock salt (also called ice melt salt) is coarser and stays intact long enough to do the job. You can find it at hardware stores, grocery stores, or online for a few dollars.

Is it safe to pour boiling water down the disposal?

Yes, but let it cool for a minute or two first so the sudden heat does not crack the sink basin or damage the rubber seals inside the disposal. Warm or hot water is fine; boiling is not necessary for cleaning and adds no benefit over hot tap water.

What if the disposal still smells after ice and salt?

Repeat the ice and salt cycle two or three times. If the smell persists, the odor may be coming from the drain pipe below the disposal, not the unit itself. Run baking soda and vinegar, let it sit for 30 minutes, then flush with hot water. If the smell continues, call a plumber to check the drain line.

Can I clean the disposal while it is running?

Yes—ice, salt, baking soda, and vinegar are all meant to go down while the water is running and the disposal is on. Never put your hand near the drain while the unit is running. Always keep the cold water flowing to flush debris away.

How do I know if my disposal needs to be replaced instead of cleaned?

If the disposal leaks, won't turn on, or makes a grinding noise without moving the blades, it needs professional repair or replacement. If it straightforward smells or grinds slowly, cleaning will fix it. A plumber can tell you whether repair or replacement makes sense based on the age and condition of the unit.