How to Deep Clean a Smelly Trash Can: A Step-by-Step Routine That Eliminates Odors at the Source

Why Your Trash Can Smells Even After You Empty It

The odor you notice when you open your trash can is rarely caused by the bag itself. It comes from the thin film of liquid and food residue that collects on the interior walls and bottom of the can, where it feeds bacteria and mold. Once these microorganisms establish a colony, they continue to release volatile compounds—the source of that sour, musty smell—even after you remove the trash.

A second hidden source is the lid and the rim. Condensation forms on the underside of the lid, and small spills often creep into the seam where the lid meets the can. If you only wipe the visible interior, you leave these areas to re-contaminate the clean surfaces within a day or two.

Finally, the bag itself can contribute. Bags that have leaked or have been sitting with wet waste develop their own odor, and the liner can transfer that smell to the can walls. This is why a quick wipe-down is not enough—you need a routine that removes the residue, neutralizes the bacteria, and prevents the conditions that allow odors to return.

Gather Your Supplies Before You Start

Before you begin, collect everything you need so you are not searching for supplies mid-task. You will need a pair of rubber gloves, a stiff-bristled brush or an old scrubbing brush, a sponge or microfiber cloth, a bucket or large sink, and a hose or a bathtub faucet for rinsing. For the cleaning agents, choose a mild dish soap, white vinegar, and baking soda—these are effective on organic residue without being harsh on plastic or metal.

If your trash can has a removable inner bucket, take it out and set it aside. For cans with a pedal mechanism or a lid that attaches with hinges, check the manufacturer's instructions before submerging the whole can in water. Most plastic kitchen cans can be rinsed outdoors or in a bathtub, but electronic or sensor-operated lids should only be wiped, never immersed.

You will also need a dry towel and a well-ventilated area. Working outdoors on a sunny day is ideal because the sun's UV light helps kill residual bacteria and speeds up drying. If you are indoors, open a window and lay down old newspapers or a towel to catch drips.

• Rubber gloves to protect your hands from residue and cleaning agents
• Stiff-bristled brush for scrubbing stuck-on food and grime
• White vinegar and baking soda for neutralizing odors at the source
• Mild dish soap for cutting through greasy residue
• A hose or large sink for rinsing, plus a dry towel for finishing

The Worked Example: Cleaning a 13-Gallon Kitchen Can

Let's walk through the process with a typical 13-gallon plastic kitchen trash can that has developed a persistent odor. The can has a swing lid, a removable inner bucket, and has been in use for about three months without a deep clean. The smell is noticeable as soon as you lift the lid, and there is a visible brown film along the bottom and lower walls.

Start by taking the can outside or to a well-ventilated area. Remove the liner bag and any loose debris, then turn the can upside down and give it a firm shake to dislodge crumbs and small particles. Rinse the interior with a hose or warm water from the faucet to loosen the film. Do not use boiling water—it can warp thin plastic.

Next, fill the can with a few inches of warm water and add a squirt of dish soap. Use your stiff-bristled brush to scrub the interior walls and bottom, working in circular motions to lift the film. Pay special attention to the corners and the seam at the bottom, where residue accumulates. Scrub the underside of the lid and the rim as well, since these areas harbor bacteria that spread odor.

Target the Odor Source with Vinegar and Baking Soda

After the soapy scrub, rinse the can thoroughly to remove all soap residue. Then, tackle the odor at its source. Sprinkle a generous layer of baking soda across the bottom and lower walls of the can. The baking soda will absorb and neutralize acidic odor molecules that remain in the porous plastic. Let it sit for about 15 minutes.

After the baking soda has had time to work, spray or pour white vinegar over it. The vinegar's acidity reacts with the baking soda to create a mild fizzing action that helps lift stubborn residue from the surface. This reaction also changes the pH of the surface, making it less hospitable to the bacteria that cause odors. Let the mixture sit for another 10 minutes, then scrub lightly with your brush and rinse thoroughly.

For a can with a particularly stubborn smell, repeat the vinegar-and-baking soda treatment once more before the final rinse. If the odor persists after two treatments, the smell may have soaked into the plastic itself. In that case, you can wipe the interior with a cloth dampened in undiluted vinegar and let the can dry in direct sunlight, which helps break down odor-causing compounds.

Dry, Deodorize, and Prevent Future Smells

Rinse the can one final time with clean water, then turn it upside down to drain. Leave it to air dry completely, ideally in direct sunlight for a couple of hours. Sunlight is a natural disinfectant, and a completely dry surface is far less likely to develop new bacterial growth. If you must dry it indoors, wipe the interior with a dry towel and leave the lid open overnight.

Once the can is dry, you can add a preventive measure. Placing a small layer of baking soda or a few drops of essential oil on a cotton ball at the bottom of the can—under the liner bag—will absorb odors between cleanings. However, do not rely on this alone; the bag should still be changed regularly, and the can should be deep cleaned every four to six weeks depending on use.

Finally, consider how you use the can. Bagging wet waste separately, rinsing out cans that held particularly pungent items, and keeping the can away from direct heat sources will all reduce the frequency of deep cleans. A trash can that is cleaned this way should stay odor-free for weeks, not just days.