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The Full List of Items to Never Put in Your Washing Machine

Last month I dyed a dress dark green for part of a Halloween costume. I rinsed the excess dye and then washed it on its own according to the instructions. But after wearing the dress while chasing my kids around as they were trick-or-treating, it was dirty and needed another wash.
 
As I tossed the dress in the washing machine with other colored clothing, I wondered if I needed to wash the dress again separately. I washed it on its own already, and it wasn’t bleeding anywhere then, I thought. It should be fine.
 
Well.
 
When I opened up the washing machine to change the loads, what do you think I saw? A bunch of just-washed clothes that were suddenly all green-tinged. Luckily the load had mostly items that didn’t show the difference, like jeans, but last-year’s Christmas pajamas were suddenly looking a lot more festive. My baby’s cute fall top now looked dingy.
 
Don’t be like me and accidentally put items in the washing machine that you think are fine only to find out afterwards that you’ve now ruined your clothes. We’ve compiled a list of 20 things you should never put in the washing machine, and some of them might surprise you. Just call me the laundry superhero, here to save your wardrobe from certain disaster.

 

Leather and Suede

A collection of leather and suede jackets hanging on a clothes rack in a stylish boutique.
Photo: MART PRODUCTION / Pexels
Water and the aggressive agitation of a washing machine strip natural oils from leather and suede, causing them to crack, shrink, or warp. You can take your leather and suede items to a specialist for cleaning, or you can use a simple cleanser and conditioner, like this one from Bick. I’ll use this on my leather shoes every couple of months or after I haven’t worn an item for a while. 
 

Memory Foam Pillows

Full body of cheerful multiracial girls using pillows while playing in bright cozy room in daytime
Photo: Monstera Production / Pexels
We all know how much better we sleep when we have the right pillow. On the flip side, we know how miserable it is when our pillow is too hard, flat, or lumpy. If you’ve got a memory foam pillow that is just right for you, don’t risk your sleep by tossing it in the washing machine.
 
Go ahead and wash the exterior cover, but never the actual pillow. The heavy tumbling and spinning that happens in a washing machine can easily tear apart the memory foam, leaving your trusty pillow a lumpy, ruined wad.
 
Loose chunks from the pillow can also clog up your washing machine. For small messes, spot clean your pillow using mild dish soap mixed with lukewarm water. Blot or gently scrub the stain. Alternatively, you can spray the stain with 3% hydrogen peroxide or stain remover, like oxy clean, then blot it away with a damp cloth.
 
If your trusty pillow needs a deep clean, fill a bathtub with water and mild soap. Put the pillow completely under water and squeeze it to allow water through. Never twist the pillow, since it will tear just like it would in a washing machine. Rinse the pillow until there are no more suds, and wrap it in a clean towel, pushing down to get out the extra water.
 
Never put your pillow in the dryer either. Let it air dry on a flat, clean, well-ventilated surface.
 

Flammable-Stained Clothing

Macro shot of red-tipped wooden matchsticks aligned vertically in a symmetrical pattern.
Photo: Reinis Brūzītis / Pexels
Any flammable liquids, like gasoline, motor oil, cooking oil, alcohol, or paint thinner, left on your clothing can cause huge damage to your washing machine. The lingering fumes can actually cause an explosion or a fire.
 
To avoid damage to your machine and danger to you, always let your clothing air out, preferably overnight, until the liquid and fumes dissipate completely. If there is a visible stain, gently blot (don’t rub!) it with a damp rag. Even better, use a strong dish soap, like Dawn, that can cut through grease, and let it sit on the stain for half an hour.
 
Next, handwash your clothing with warm water and heavy-duty soap. Let it air dry again. If all traces of flammable liquid are gone, including lingering smells, you should be good to use the washing machine the next time.
 

Hair-Covered Items

Charming ginger cat sitting calmly on a green armchair while being gently brushed indoors.
Photo: cottonbro studio / Pexels
I grew up riding horses, and it was one of my absolute favorite things to do. I still love horses and miss riding.
 
One of the most important parts of learning to horseback ride happens off the horse’s back: learning to groom the horse properly. Grooming can get pretty messy. You’re scrubbing off caked-on mud, detangling snarly manes, and picking out dirt and more from their hooves.
 
The first brush you often use is called a curry comb, which helps essentially exfoliate the dirt and shedding hair. Often in the spring, I would leave the barn with a winter coat’s worth of hair stuck to my riding gear.
 
Unless you’re allergic to pet hair or dislike animals (no judgment!), most of us have had the experience of snuggling up with our dog or petting the cat only to see afterwards that we are covered in pet hair. You may be able to wipe some of it off, but that stuff is clingy.
 
As much as we might want to just throw that hair-covered top in the washing machine, the fur won’t magically just wash away. It can actually clump and stick to the drum of your machine and even clog the drain pipes. Always use a lint roller to remove as much fur as possible, or run the item through a cool, no-heat dryer setting before washing.
 

Underwire Bras and Lingerie

Elegant black lingerie on a plain white background, highlighting its delicate design.
Photo: Skylar Kang / Pexels
I honestly had no idea I wasn’t supposed to put bras or lingerie directly into the washing machine, but here we are, learning together. Apparently the underwire can come out and tear up your clothes and jam the washing machine. You’re supposed to put the items in a special mesh bag in the washing machine or just handwash your bras and lingerie. 
 

Swimwear

Full body fit young female in swimwear and trendy sunglasses lying on inflatable pool bed and sunbathing
Photo: Armin Rimoldi / Pexels
Growing up, mom always told us to wash our swimsuits in the shower after wearing them. Maybe mom knew the rule about not putting them in the machine, or maybe she was just brilliant and knew it would save time.
 
Either way, the combination of the chlorine, salt, and agitation from the washing machine can break down the spandex and stretch in simsuits, so handwashing them in cool water helps them keep their shape. 
 

Suits and Structured Blazers

Two business professionals in modern blazers holding a laptop outdoors.
Photo: MART PRODUCTION / Pexels
Suits and structured blazers should always be taken to the dry cleaner. If the shoulder pads or canvas interlinings get too wet or tossed around, they lose their structure and stay permanently puckered. Even if you like a puff-sleeved top, no one wants a puckered jacket that is supposed to drape down smooth and crisp.
 

Neckties

Photo: Solstice Hannan / Unsplash
Most ties are made from materials like wool or silk that can shrink in a normal washing machine. Many of the designs on ties also utilize unique designs that can fade with a standard wash. To avoid these issues or losing the inner lining, stick to spot cleaning or dry-cleaning those ties.
 

Coins, Keys, and Pocket Clutter

Euro banknotes and coins with house keys on a table symbolize finance and real estate.
Photo: Jakub Zerdzicki / Pexels
We all do it unknowingly. You forget that leftover change or the loose paperclips. But those little bits and bobs can not only snag and damage your clothing but can scratch the drum of your machine or even shatter your pump filters. Even if you’re in a rush, try to remember to check and empty all pockets before putting your clothes in the hamper.
 

Wool

Top view textured abstract background of white knitted woolen textile placed on table
Photo: Skylar Kang / Pexels
I have several glorious sweaters, thanks to my mom, who is an insanely talented knitter. One of the benefits of getting sweaters from her is that she uses actual wool in her knitting. When I got my first handmade sweater from her, I made the mistake of using the washing machine, and out came my sweater, shrunk and felted. I was devastated.
 
Since then I’ve learned to always, always handwash my wool items. I just use soap and cool water in the sink. After that, I squeeze out the extra water. Never wring out your wool clothing! To dry your wool, lay it flat on a towel, and roll it up, squeezing out any leftover water.
 
Then, let the item air dry flat. This helps it to retain its shape and fiber integrity.
 

Cashmere

A woman playfully hides her face in a black turtleneck sweater, expressing a shy demeanor.
Photo: Anna Shvets / Pexels
Cashmere is a type of wool, so the same rules apply. However, cashmere is even more delicate than standard sheep wools, so be sure to treat it gently, never put it in the dryer, and consider taking it for dry cleaning.
 

Silk

A vivid collection of silk shawls showcasing intricate patterns and bold colors on display.
Photo: Nimit N / Pexels
While there are silks these days that are labeled as washable silks, most of your silk items should never get cleaned in your washing machine.
 
Silk fibers are made of proteins that become more fragile when wet, so the rough tumbling and spinning from washing machines can break down or stretch out the fibers, permanently distorting your clothing. Most detergents are also not sensitive enough for silk and can literally dissolve and fade the fibers. 
 
Silk threads also pull together in what’s called relaxation shrinkage when they get wet, so that structured blouse could completely lose its shape.
 

Some Sneakers

Stylish green and white sneakers artfully displayed on a tire, enhancing footwear appeal.
Photo: Nicolae Anghelenici / Pexels
Go ahead and throw that pair of Converse or those mesh-lined shoes you wear to the gym in the wash. But many sneakers won’t come out as durable or looking the same. Always check the material of the shoe and check with the manufacturer. Canvas, nylon, cotton, or polyester shoes are usually good to go. But you’d hate to put your running shoes through a cycle only to realize the glue isn’t holding quite as well as before.
 

Clothes with Embellishments

Close-up of elegant white bridal gowns adorned with intricate embellishments and jewels.
Photo: Alina Skazka / Pexels
I wish the bedazzled party shirts would come back in style, and I’m sure one day they will. For now, this one isn’t as common an issue, but if you’re one of the lucky few with reason for rhinestones, brooches, or sequins, consider saving your clothes from the rough and tumble of the washing machine. Those details are delicate, and the washing machine could rip them off or tug them in ways that leave your clothing misshapen.
 

Rubber-Backed Mats

Red exercise mats and dumbbells on a gym floor, perfect for home or studio fitness.
Photo: Pavel Danilyuk / Pexels
Like many of the other materials on this list, rubber can’t hack it when it comes to water and the level of agitation a washing machine uses. The rubber on the back of your bathroom mat can crack, flake off, and break apart from the water, heat, and spin cycle, not just ruining your mats but also potentially clogging and ruining your machine. Those babies also retain a lot of water, which is hard on the machine.
 

Waterproof and Windbreaker Outerwear

Gray windbreaker jacket with 'OVRNIGHTR' logo displayed in selective focus.
Photo: Erik Mclean / Pexels
Here was another surprise for me. Waterproof or sealed jackets can trap water during a washing cycle. This can then cause an unbalanced, explosive burst of pressure or water.
 

Baseball Caps

Collection of trendy baseball caps arranged on a store shelf, showcasing different designs.
Photo: Marcelo Lemes / Pexels
I love a good baseball cap. It can cover up a bad hair day and give you a tad more shade. A good cap can also go with all aesthetics, from preppy or sporty.
 
If you’re wearing one often though, you’ll have to wash it out to keep it from retaining sweat, oils, or makeup.
 
Before washing, make sure you know what material is inside the brim. Most modern brims use plastic, but vintage hats often used cardboard, which shouldn’t be submerged.
 
If your hat’s brim is plastic, handwash the hat in lukewarm water in the sink with a bleach-free laundry detergent. Let it soak for about 20 minutes before rinsing it out. Let it dry on a rounded object to help maintain the its shape.
 

Weighted or Very Heavy Blankets

Young woman peacefully resting with a weighted blanket, enjoying relaxation and comfort.
Photo: Niels from Slaapwijsheid.nl / Pexels
On more than one occasion I’ve heard my washing machine banging around, whirring, and squealing, and I knew it was possessed. . . or at the very least it was breaking in front of me. That rapid back and forth tipping as it sloshes the load side to side is loud!
 
But before you call the appliance repair technician or the ghostbusters, check your load. Whenever I’ve had a demon-like washing machine, it’s usually because I’ve added one too many towels to the load or thought I could toss a blanket in.
 
The problem is when those big, heavy items get wet, they just get even heavier, sometimes absorbing so much water they even triple their weight. This causes imbalance in the machine, and thus the terrifying noises. If your big, heavy blankets need a wash, take them to a commercial laundromat, or handwash them in a tub.
 

Items Labeled Dry Clean Only

Two pink rubber cleaning gloves hanging to dry on a wooden stick outdoors in sunlight.
Photo: KÁ 🐟 / Pexels
Self explanatory, right?
 

Clothes that May Bleed

A vibrant, close-up shot of pink bleeding heart flowers in full bloom against a green and yellow background.
Photo: 대정 김 / Pexels
Let’s finish with another story, shall we?
 
When my husband was in medical school, he got an official white coat from his school that he had to wear for certain events and procedures. Each medical student only got one of these white coats, and it was embroidered with the student’s name above the institution’s.
 
One day he mentioned that he had official school pictures the next day and he needed to wear his white coat. Well, there were only two items that needed washing: his white coat, and a massive, blue throw blanket. Without a thought, my husband put them both in the washing machine together and started the load.
 
As you can expect, in an hour, the white coat was no longer white. That official, irreplaceable, name-embroidered white coat had deepened to a dingy, gray-blue. We were horrified.
 
So the white coat immediately got another bath, this time in the kitchen sink with inordinate amounts of bleach. It soaked like that for several hours as we looked on in worry. While I wouldn’t say it ever got back its crisp white, it was white enough for pictures the next day.
 
Moral of the story? Never assume what will and won’t bleed. And don’t take the shortcut and throw together all the whites, darks, colors, and brights. Please, just give them their own loads.
 

“Clothesing” Up the List

I am so grateful I don’t live in a place or in an era where handwashing is the norm. I was surprised in my research by some of the items that shouldn’t go in the wash. Tell me, were there any surprises to you?

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