How to Clean and Deodorize a Top-Loading Washing Machine That Smells Musty

Why Your Top-Loading Washing Machine Develops Musty Odors

A top-loading washing machine is a workhorse in any home, but over time, moisture, detergent residue, and fabric softener buildup can create a breeding ground for mold, mildew, and bacteria. This often results in a musty smell that transfers to your laundry, leaving clothes smelling less than fresh. The problem is especially common in machines with a center agitator, where hidden nooks trap grime. Neglecting this issue can also reduce your machine’s efficiency and lifespan. Fortunately, cleaning and deodorizing your washer is a straightforward process using common household items and a few specialized products. This guide walks you through every step, from removing sludge to preventing future odors, so your washing machine stays fresh and performs at its best.

What You Need to Clean Your Washing Machine

Before you start, gather the necessary tools. Essential items include white vinegar, baking soda, a soft cloth or sponge, an old toothbrush for tight spaces, and a bucket. For a deeper clean, consider using a CLR calcium lime rust remover if you have hard water deposits, and baking soda is excellent for neutralizing odors. distilled white vinegar will help dissolve residue. You may also want microfiber cleaning cloths for wiping down surfaces without scratching.

Step-by-Step Cleaning Process

Step 1: Unplug and Access the Machine

Safety first: unplug your washing machine from the power outlet. For a top-loader, lift the lid and remove the detergent drawer if possible. Check the owner’s manual for specific draw removal instructions. Set aside any removable parts like the bleach dispenser or fabric softener cup.

Step 2: Soak and Scrub the Detergent Drawer

Fill a sink or bucket with hot water and add a cup of white vinegar. Submerge the detergent drawer and any removable dispensers. Let them soak for at least 30 minutes. Use an old toothbrush to scrub away caked-on detergent and mold. Rinse thoroughly with hot water and air-dry while you work on the rest.

Step 3: Clean the Interior Drum

Now, address the drum. If you have a center agitator, you can remove it for deep cleaning (check your manual). For most machines, wipe down the inside walls, lid, and agitator with a cloth dipped in a solution of equal parts water and white vinegar. Pay special attention to areas under the lid rim and around the agitator base where grime accumulates. For stubborn stains, make a paste with baking soda and water, apply it, let it sit, then scrub.

Step 4: Run a Cleaning Cycle with Vinegar and Baking Soda

Return the detergent drawer (reinsert it if dry). Add four cups of white vinegar directly into the drum or through the detergent compartment (check your manual). Then, add one cup of baking soda to the drum. Set the machine to the hottest and largest load setting, and run a full cycle. The vinegar will dissolve soap scum and mineral deposits, while baking soda neutralizes odors. Stop the cycle about 5 minutes after agitation begins and let it sit for an hour to allow the solution to work, then resume and finish.

Step 5: Tackle Hard Water Stains and Mold

If you notice calcium or lime deposits on the drum or agitator, use a CLR calcium lime rust remover following the product instructions. For mold spots, wipe with a bleach solution (1/4 cup bleach per gallon of water) but avoid mixing bleach with vinegar. Rinse thoroughly afterward.

Step 6: Wipe Down External Surfaces

Use a damp microfiber cleaning cloths to clean the outside, including the top, sides, and control panel. For sticky spots, a mild all-purpose cleaner works well. Dry with a second cloth to prevent water spots.

Preventing Future Musty Odors

Leave the Lid Open After Use

One of the simplest ways to prevent mold is to leave the washing machine lid open for a few hours after each use to allow moisture to evaporate. This stops mold spores from multiplying.

Use High-Efficiency Detergent Correctly

Overusing detergent leads to buildup. For synthetic fabrics like activewear, a specially formulated activewear laundry detergent can reduce residue. Alternatively, laundry detergent sheets are a convenient option that pre-measures the right amount, cutting down on excess soap.

Run Periodic Maintenance Washes

Every month, run an empty cycle with two cups of white vinegar or a cup of baking soda to keep the machine fresh. This should prevent odor buildup and keep your washing machine performing efficiently.

Check and Clean the Drain Pump Filter

Many top-loaders have a drain pump filter that catches lint and debris. Locate it (often behind a small panel at the front bottom) and clean it every few months. This prevents clogs and odor from trapped moisture.

Deep Cleaning for Stubborn Odors

If the musty smell persists after the standard cleaning, try a deep clean using three cups of white vinegar and a full cup of baking soda, followed by a second rinse cycle with half a cup of vinegar. For machines with heavy buildup, consider using a commercial washing machine cleaner as an alternative to vinegar. Additionally, washing soda can be added to the drum to boost cleaning power for hard water areas.

Caring for Your Machine Between Cleanings

To extend the life of your washer, always remove wet laundry promptly to avoid mildew smells. Avoid using excess detergent, especially in cold water cycles where it doesn’t dissolve well. Wipe the door seal and lid edge monthly with vinegar to prevent grime buildup. If you use dryer balls, like wool dryer balls, they reduce static and help clothes dry faster but do not affect the washing machine directly. However, keeping lint out of the washer is important, so clean the drum filter as recommended.

Conclusion

A musty-smelling top-loading washing machine doesn’t have to be a permanent problem. With regular cleaning using vinegar, baking soda, and a few specialized products like CLR for hard water, you can eliminate odors and keep your machine running smoothly. The key is consistency: leave the lid open, use the right amount of detergent, and run monthly maintenance cycles. By following this guide, your laundry will smell fresher, your machine will last longer, and you’ll avoid the frustration of re-washing clothes due to lingering smells.