You’ll Be Surprised What’s Hiding in Your Washing Machine — And Why You Should Open It Once a Month

Most people run their washing machines without giving much thought to what goes on inside. The routine is familiar: load the clothes, add detergent, press start, and walk away. Because the machine hums along quietly, it’s easy to forget that it requires regular care, just like any other major appliance in the home.

Behind the drum, the door, and the digital controls sits a small but critical component that rarely receives attention. This unassuming part works behind the scenes every single cycle and is one of the key reasons your laundry emerges clean and fresh. It’s the washing machine filter—a hidden safeguard designed to protect the appliance and enhance its overall performance.

The filter’s job is simple but vital: it traps everything that comes off your clothes during a wash. Lint, loose fibers, dust, pet hair, and even small objects accidentally left in pockets all pass through the machine. Without a functioning filter, this debris would circulate freely inside the system, potentially clogging hoses, damaging the pump, or disrupting the machine’s ability to run smoothly.

Over time, the filter accumulates far more material than most people realize. Because it is tucked away behind a small access panel or hidden inside the drum, its condition is often overlooked. Many households go months—or even years—without knowing the filter exists, let alone that it requires routine cleaning.

The earliest sign of a clogged filter usually isn’t something you see, but something you smell. Instead of the crisp scent of freshly washed clothes, a musty odor begins to linger. This happens because trapped debris holds moisture, creating an ideal breeding ground for bacteria and mildew.

Poor drainage is another common symptom. When water can’t move freely through the machine, cycles may run longer, pause unexpectedly, or end with clothes unusually wet. In some cases, detergent remains on fabrics, leaving them sticky or streaked instead of clean.

A blocked filter can also drive up energy consumption. When the machine struggles to drain or circulate water properly, it uses more power to complete each load. Over time, this inefficiency can increase electricity bills and put unnecessary strain on the motor.

Fortunately, preventing these issues is simple. Cleaning the filter takes only a few minutes each month—and the benefits can extend the life of your appliance and improve the quality of every wash.

Before beginning, always unplug the machine. Safety comes first, and disconnecting the power ensures you can work without risk. Next, locate the filter. On front-loading models, it is typically found behind a small door near the bottom of the machine. In top-loading units, it may be situated inside the drum or attached to the agitator.

Place a towel or shallow container underneath the filter before opening it. A small amount of water often spills out, especially if the machine was used recently. Once you remove the filter, you’ll likely find lint, hair, and residue clinging to its surface. Rinse it under warm water until everything washes away. For stubborn buildup, use a soft brush or an old toothbrush to gently scrub it clean.

Don’t forget to wipe the interior compartment where the filter sits. Detergent residue and grime can collect around the edges, and clearing it helps maintain a cleaner environment inside the machine. When everything is dry, reinsert the filter firmly and close the panel.

For an added refresh, run an empty cycle with hot water and a cup of white vinegar. This simple method helps dissolve detergent residue, eliminate odors, and leave the drum smelling clean. Many appliance experts recommend combining this deep-clean with monthly filter maintenance.

Regularly cleaning the filter improves washing performance in numerous ways. Clothes come out cleaner, fresher, and free of residue. The machine operates more quietly and efficiently. Drainage issues vanish, and cycles run smoothly rather than sputtering or stalling.

This upkeep is especially valuable in busy households. Large families, pet owners, or people who frequently wash bulky items like towels or bedding will notice more debris accumulating in the filter. Homes in humid climates also benefit from consistent maintenance, as moisture buildup can amplify odors and mildew growth.

For individuals with allergies, a clean filter can reduce exposure to dust, lint, and irritants that might otherwise circulate in the laundry area. Some newer washing machine models even come equipped with indicators that alert users when the filter needs attention. If yours has this feature, it’s a helpful reminder not to let maintenance slip. If not, a simple monthly calendar reminder works just as well.

Whether your washing machine is brand-new or several years old, filter cleaning is essential. Even the most modern appliances begin collecting debris with the very first load. Establishing a cleaning routine early helps preserve the machine’s performance over the long term.

Your initial cleaning may reveal more buildup than you expect—and that’s completely normal. It simply means the filter has been doing its job. Each subsequent cleaning becomes faster and easier.

Once filter maintenance becomes part of your regular routine, you’ll likely notice a marked improvement in how your washing machine operates. Clothes smell cleaner, cycles feel more efficient, and the machine itself runs with less strain and noise.

Routine filter care also prevents costly repairs. Many common washing machine issues—poor drainage, loud operation, mid-cycle interruptions—can be traced back to a clogged filter. By keeping it clean, you eliminate the root cause of these problems before they develop.

In the long run, this small monthly habit can extend the lifespan of your appliance and save you money on service calls or premature replacements. A few minutes of maintenance ensures one of your home’s most essential appliances continues performing at its best.

Keeping the washing machine filter clean may seem like a minor responsibility, but it delivers major benefits. It improves hygiene, boosts performance, and ensures better results with every load. Your clothes stay fresher, your machine stays healthier, and your household becomes more efficient.

A well-maintained filter keeps the washing machine running as intended—quietly, reliably, and effectively—cycle after cycle. It’s a simple task with lasting rewards for your home, your comfort, and your budget.