7 Common Items That Can Damage Your Washer

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A washing machine should make life easier, not slowly fall apart behind the scenes. Yet that’s exactly what happens in countless homes every single day, thanks to a handful of everyday items that sneak into the drum and quietly wreak havoc. Most people never connect the dots until the spin cycle sounds like a construction site or the repair bill lands with a thud. By then, the damage already sits deep inside the machine, and fixing it feels like an expensive lesson no one asked for.

This is where things get interesting. Some of the biggest threats to a washing machine don’t look dangerous at all, and that’s what makes them so easy to overlook. Experts in appliance repair keep seeing the same culprits show up again and again, turning simple laundry loads into long-term problems. Knowing what to keep out of the wash can stretch the life of a machine, save serious money, and keep laundry day running smoothly.

1. Coins and Loose Change: Tiny Metal, Big Trouble

Coins may seem harmless, but they act like tiny wrecking balls once the wash cycle starts. During agitation and spinning, those small pieces of metal bounce around at high speed, striking the drum, slipping into crevices, and sometimes lodging in the pump. Over time, this repeated impact can scratch the interior of the washer and even weaken components that should last for years. Repair technicians often find coins stuck in drainage systems, which can block water flow and trigger frustrating malfunctions. A single forgotten coin might not destroy a machine instantly, but repeated exposure builds up damage in ways that add up quickly.

The fix stays simple but requires consistency. Always check pockets before tossing clothes into the wash, even when it feels tedious. A quick habit of flipping pockets inside out can prevent coins from sneaking through unnoticed. Using a small tray or jar near the laundry area for loose change creates a routine that sticks. This small step protects both the washer and the clothes themselves, since coins can also tear fabrics during the spin cycle. It takes seconds to check, but skipping that step can cost a lot more down the line.

2. Zippers and Metal Hardware: The Drum’s Worst Enemy

Zippers, buttons, and metal embellishments bring style to clothing, but they turn into trouble inside a washing machine. These hard surfaces scrape against the drum during cycles, gradually wearing down protective coatings and creating scratches that can lead to rust over time. Once rust forms, it can transfer onto clothes and cause permanent stains that ruin entire loads. The friction also creates unnecessary stress on the washer’s interior, especially when heavier garments with lots of hardware go in together.

A few small adjustments can make a big difference. Zip up all zippers before washing to reduce sharp edges and prevent them from catching on other fabrics. Turn garments with heavy hardware inside out so that the softer fabric side faces outward. Laundry bags designed for delicate items can also help contain these pieces and reduce direct contact with the drum. Taking these precautions keeps both the washer and wardrobe in much better shape, without adding much effort to the routine.

3. Excess Detergent: More Soap, More Problems

It feels logical to add extra detergent when clothes look especially dirty, but that instinct often backfires. Too much detergent creates excessive suds that don’t rinse out properly, leaving residue inside the washer and on clothing. Over time, this buildup can clog internal components, reduce efficiency, and even lead to unpleasant odors that linger in the drum. Modern washing machines, especially high-efficiency models, require far less detergent than many people expect.

Using the correct amount makes a noticeable difference. Always follow the manufacturer’s guidelines on detergent packaging, and adjust based on load size rather than guesswork. Measuring instead of pouring freely prevents accidental overuse. Running a monthly cleaning cycle with a washer cleaner can also help remove any residue that starts to accumulate. Less detergent doesn’t mean less clean; it actually helps the machine do its job more effectively.

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4. Heavy Blankets and Bulky Loads: Too Much of a Good Thing

Large items like comforters and heavy blankets may fit inside the washer, but that doesn’t mean they belong there. These bulky loads can throw off the balance of the drum, especially during the spin cycle, which puts strain on the motor and suspension system. An unbalanced load can cause the machine to shake violently, leading to wear and tear that shortens its lifespan. Overloading also prevents proper cleaning, since water and detergent can’t circulate evenly through the fabric.

Breaking up large loads into smaller ones helps maintain balance and improves cleaning results. For oversized items, consider using a commercial-grade washer that handles bulk more effectively. Distributing weight evenly inside the drum also reduces stress on internal components. Giving the washer room to move properly keeps everything running smoothly and avoids unnecessary strain. A machine that operates without struggle lasts longer and performs better over time.

5. Pet Hair Overload: A Hidden Drainage Disaster

Pet hair loves to cling to fabrics, and while a little bit may seem harmless, large amounts can create serious problems inside a washing machine. Hair can accumulate in filters, clog drainage systems, and stick to the interior of the drum. Over time, this buildup restricts water flow and reduces the machine’s ability to function efficiently. In severe cases, it can even lead to blockages that require professional repair.

Managing pet hair before washing makes all the difference. Use a lint roller or brush to remove as much hair as possible from clothing and bedding before placing items in the washer. Washing pet-heavy items separately can also help prevent hair from spreading to other garments. Regularly cleaning the washer’s filter ensures that any remaining debris doesn’t build up over time. Staying proactive keeps the machine running smoothly and prevents frustrating clogs.

6. Delicate Items Without Protection: A Risky Move

Delicate fabrics require extra care, and tossing them directly into the washer without protection can lead to damage for both the items and the machine. Lightweight materials can get caught in the drum or tangled with other clothing, which increases the risk of tears and stretching. Small items like lingerie can even slip into gaps within the machine, potentially causing internal issues that are difficult to diagnose.

Using mesh laundry bags offers a simple solution that protects delicate items while keeping them contained. Sorting laundry by fabric type also helps reduce friction between heavier and lighter garments. Choosing the appropriate wash cycle ensures that the machine handles delicate items gently. These steps not only preserve clothing but also prevent unnecessary strain on the washer. A little extra care goes a long way in avoiding bigger problems.

7. Sand and Grit: The Silent Scratcher

Sand may seem like an outdoor problem, but it often finds its way into washing machines through clothes, towels, and shoes. Once inside, those tiny particles act like sandpaper, grinding against the drum and internal components. This abrasive action can cause scratches, wear down surfaces, and even damage seals over time. The effects may not show up immediately, but repeated exposure leads to noticeable deterioration.

Shaking out items thoroughly before washing helps remove loose sand and grit. For heavily soiled items, rinsing them outside or in a utility sink can prevent debris from entering the machine in the first place. Running an empty rinse cycle occasionally can help flush out any remaining particles. Keeping sand out of the washer protects its internal structure and keeps it functioning smoothly. It’s a simple habit that prevents long-term damage.

The Real Secret to a Long-Lasting Washer

A washing machine doesn’t fail overnight; it wears down through repeated small mistakes that add up over time. Paying attention to what goes into each load can make a dramatic difference in how long the appliance lasts and how well it performs. Simple habits like checking pockets, using the right amount of detergent, and protecting delicate items create a ripple effect that keeps everything running efficiently. These changes don’t require major effort, but they deliver major results.

So which of these items has been sneaking into your wash unnoticed, and what changes can you start today to keep that machine in top shape? Let’s hear about it in the comments below!