What Not to Wash in a Washing Machine: 25 Items That Can Damage Clothes or the Washer

Do not machine-wash items that can fall apart into debris (rubber-backed mats, memory foam, some stuffed items), become dangerously heavy (soaking rugs, heavy blankets not rated for your washer), or have hard parts that can impact the drum (shoes without a method, metal-heavy items, loose underwires). Also avoid items labeled “dry clean only” or “hand wash,” and anything contaminated with flammables (oil-soaked rags).

What’s really happening (why washers get damaged)

‍A washing machine fails when one of these happens:

• Debris overwhelms the drain system
  • Lint, rubber backing, foam crumbs, pet hair, and paper fragments can clog the pump filter, jam the impeller, or block the drain hose.
• Loads become unbalanced and mechanical stress spikes
  • One heavy, waterlogged item can slam the drum, overwork suspension, or trigger repeated spin aborts.
• Hard parts strike the drum, door, or tub
  • Coins, screws, bra underwires, and shoe soles can dent a stainless drum or damage door glass and baffles.
• Chemicals attack seals and plastics
  • Solvents, strong degreasers, and certain adhesives can degrade door boots, hoses, and pump components.
• Heat and agitation ruin “structured” materials
  • Laminations, interfacing, waterproof coatings, and glued seams can delaminate or break down.

Ranked action plan (Low effort → Medium → High)

Low effort: quick screening before you toss it in

• Read the care label and believe it.
  • Why it works: the label is the manufacturer’s tested boundary for agitation, water temp, and spin.
  • Tools/materials: none.
  • Common mistakes: assuming “gentle cycle” makes everything safe.
• Empty pockets and remove loose hardware.
  • Why it works: prevents drum damage and pump jams.
  • Tools/materials: none.
  • Common mistakes: washing “just one time” with coins/keys.

Medium effort: safer methods that prevent damage

• Use a mesh laundry bag for small items or anything with straps/hooks.
  • Why it works: limits flailing and snagging; reduces hardware impacts.
  • Tools/materials: mesh bag.
  • Common mistakes: overstuffing the bag so items don’t rinse well.
• Hand wash or spot clean when structure matters (foam, stiffened fabrics, glued trims).
  • Why it works: avoids agitation that tears or delaminates.
  • Tools/materials: basin; mild detergent; towels.
  • Common mistakes: wringing aggressively and tearing seams.

High effort: when it’s better to avoid the home washer entirely

• Use a commercial machine sized for bulky items or send out for cleaning.
  • Why it works: correct drum volume prevents imbalance and suspension abuse.
  • Tools/materials: laundromat/commercial washer or professional cleaner.
  • Common mistakes: forcing a king comforter into a small front-loader.

What not to wash in a washing machine (and what to do instead)

‍This list assumes typical U.S. home washers (front-load or top-load). When in doubt: follow the care label.

1. Rubber-backed bath mats and rugs (latex/rubber backing)

• Why not: backing can crack and shed, clogging the pump and hoses.
• Do instead: shake/vacuum; hand wash; or machine-wash only if the label explicitly allows and you use cold, gentle, and minimal spin.

2. Memory foam pillows, foam toppers, foam cushions

• Why not: foam tears into crumbs, holds water, and becomes dangerously heavy.
• Do instead: spot clean; air dry; follow foam manufacturer instructions.

3. Very bulky comforters/duvets not rated for your washer capacity

• Why not: imbalance and suspension stress; poor rinse; spin aborts.
• Do instead: laundromat large-capacity machine or professional cleaning.

4. Heavily soiled oil/grease rags (automotive, cooking oil saturation)

• Why not: fire risk in dryer; oil can coat drum and drain components.
• Do instead: dispose per local guidance or clean via a controlled degreasing process outside household laundry; never dry until fully de-oiled.

5. Items with solvent contamination (paint thinner, gasoline, acetone)

• Why not: flammability and chemical attack on seals.
• Do instead: do not machine-wash; follow hazardous material disposal/cleaning practices.

6. “Dry clean only” garments

• Why not: adhesives, linings, and dyes can fail in water/agitation.
• Do instead: professional dry cleaning.

7. “Viscose/rayon” pieces that are labeled hand wash/dry clean (common)

• Why not: wet strength can be low; distortion and shrink are common.
• Do instead: follow label; often dry clean or careful hand wash.

8. Leather, suede, and most faux leather

• Why not: water and agitation warp, crack, and delaminate coatings.
• Do instead: wipe clean; specialty leather care.

9. Shoes without a controlled method (especially heavy boots)

• Why not: impact damage and imbalance; can crack door glass on front-loaders.
• Do instead: if machine-washing is allowed: use a shoe bag, small load, towels for cushioning, low spin; otherwise hand wash.

10. Bras with underwire (especially if older)

• Why not: underwire can escape and puncture the door boot or tub components.
• Do instead: lingerie bag + gentle cycle, or hand wash.

11. Pet bedding loaded with hair

• Why not: hair can mat and clog filters and pumps.
• Do instead: vacuum thoroughly first; use a pet-hair catcher; clean filter after.

12. Throw pillows with glued-on decorations, sequins, or heat-bonded appliqués

• Why not: trims detach; debris clogs drain; surface gets destroyed.
• Do instead: spot clean or hand wash.

13. Anything with loose glitter

• Why not: it never fully leaves; it migrates into seals and drains.
• Do instead: avoid machine-washing; spot clean; containment bag if label permits.

14. Large entryway mats or heavy woven rugs

• Why not: waterlogged weight + imbalance; can strain bearings/suspension.
• Do instead: hose off outside; professional cleaning; commercial washer.

15. Items with lots of metal (costumes, heavily beaded garments)

• Why not: impact damage; snagging; corrosion staining.
• Do instead: hand wash or specialty cleaning.

16. Hard plastic items (some caps, rigid gear)

• Why not: they bang around and can crack or chip.
• Do instead: hand wash.

17. Diapers or diaper covers not designed for machine washing

• Why not: components/liners can shed; sanitation issues if not handled properly.
• Do instead: follow the manufacturer’s laundering protocol strictly.

18. Any item that can’t tolerate waterlogging (some backpacks, structured bags)

• Why not: foam and stiffeners deform; adhesives fail.
• Do instead: spot clean.

19. Pillows labeled “spot clean only”

• Why not: internal fills clump; seams fail; poor drying leads to mold.
• Do instead: spot clean and air dry thoroughly.

20. Curtains with metal grommets (unless labeled machine-safe)

• Why not: grommets can snag and impact the drum.
• Do instead: hand wash or use a large mesh bag and gentle cycle if allowed.

21. Wool items not labeled machine washable

• Why not: felting and shrink from heat + agitation.
• Do instead: hand wash cold with wool-safe detergent, or dry clean.

22. Silk (unless explicitly machine-washable)

• Why not: abrasion, dye loss, and water spotting.
• Do instead: hand wash or dry clean per label.

23. Outdoor gear with waterproof/breathable membranes (unless you follow the exact care instructions)

• Why not: wrong detergent and softeners ruin water repellency and breathability.
• Do instead: use a technical wash product and skip fabric softener; follow brand instructions.

24. Items with excessive sand, grit, or construction dust

• Why not: abrasives accelerate seal wear and can lodge in drains.
• Do instead: shake/brush off outside; pre-rinse; then wash.

25. Anything with “do not wash” or “do not immerse” labeling

• Why not: it’s telling you the materials/assembly will fail.
• Do instead: spot clean or professional cleaning.

Stop DIY and call a pro if…

• The washer won’t drain, drains slowly, or makes a grinding/humming sound during drain (possible pump jam).
• You see rubber/foam debris in the tub, filter, or drain hose.
• The washer repeatedly stops or refuses to spin due to imbalance even with normal loads afterward.
• There’s a burning smell, electrical odor, or breaker trips.

Maintenance cadence
Weekly

• Check pockets; use mesh bags for small/hard items; leave door open after washing to reduce odor and mold.

Monthly

• Clean the pump filter (front-loaders and many HE top-loaders).
• Run a maintenance cycle per the washer manual; wipe door gasket folds.

Quarterly

• Inspect the drain hose routing and look for kinks; clean detergent drawer/dispensers.

Annually

• Inspect fill hoses for bulges or cracking; consider replacing rubber hoses with braided hoses if appropriate for your setup.

FAQ

1. Can I wash rubber-backed bath mats in the washer?
   Only if the label explicitly allows it. Otherwise, backing can shed and clog the drain system.
2. What happens if foam gets into a washing machine?
   It can break into crumbs and jam the pump/filter, causing drain failures and loud grinding during drain.
3. Is it safe to wash shoes in a front-load washer?
   Sometimes, but only with a controlled method (shoe bag, towels, low spin). Heavy shoes can crack door glass or cause severe imbalance.
4. Why did my washer stop spinning after washing a heavy blanket?
   Likely an imbalance event or a load too heavy when waterlogged. Repeated events can stress suspension and bearings.
5. Can I wash “dry clean only” in cold water?
   Usually not. Many “dry clean only” items have linings/adhesives that fail even in cold gentle cycles.
6. What items commonly clog the washer drain pump?
   Rubber-backed rugs, excessive pet hair, paper/tissues, foam debris, and small hard objects like coins and screws.
7. Can I wash bras with underwire?
   Risky without a lingerie bag. Underwires can escape and damage the door boot or internal components.
8. Are microfiber cloths safe to wash?
   Yes, generally. Avoid washing them with lint-heavy cotton; skip fabric softener which reduces absorbency.
9. What should I do if my washer smells after washing pet bedding?
   Clean the filter, run a maintenance cycle, wipe the gasket, and ensure the tub dries between uses.
10. How do I know if a rug is too big for my washer?
    If it fills most of the drum dry or becomes a single heavy mass when wet, it’s likely too large; use a commercial machine.

Sources you would cite

• Your washer’s Use & Care Guide (sections: “Load size,” “Care labels,” “Cleaning the pump filter,” “Maintenance cycle”)
• Textile care label standards and guidance (care symbol interpretation references)
• CPSC consumer guidance on flammables and household laundering safety
• Manufacturer care instructions for specialty fabrics (wool, silk, waterproof/breathable outdoor gear)