Which items should not go in the washing machine: 4 common culprits

A quick wash between two appointments: press a button, job done - that’s how it works in most homes. Right up until the machine suddenly starts vibrating, banging loudly, or your favourite jumper comes out barely recognisable. When that happens, it’s rarely because the appliance is “broken”; more often, it’s down to washing certain delicate items the wrong way - pieces that simply don’t cooperate in everyday drum life.

Why some items push the washing machine to its limits

A washing machine drum may look tough, but it isn’t a safe. It spins up, speeds up, slows down - and anything hard, heavy, or poorly balanced batters the drum with every turn. During the spin cycle in particular, the forces acting on the bearings, suspension and drum ramp up significantly.

At the same time, the fabrics themselves take a hit: delicate materials snag, fibres are overstressed, and shapes lose their form. In many households, the same culprits keep turning up: metal parts on underwear, heavy shoe soles, sensitive wool fibres, and fabrics that trap water like a sponge.

"If you wash everything ‘as usual’, over time you risk a vibrating machine, damaged bearings and clothes that age faster than they need to."

Three warning signs suggest the machine is being overloaded:

• unusually loud knocks or rumbling
• a spin cycle that keeps stopping or seems to be constantly “searching”
• clothes that come out clearly misshapen, stretched out or tangled

In situations like these, the answer isn’t extra detergent or a harsher programme. What helps is a stricter separation: what can the machine genuinely handle - and what needs special treatment?

Problem 1: Bras - small metal parts, big damage inside the drum

Bras may seem harmless, yet they can cause surprising havoc inside the machine. Hooks catch on other items, pull threads and tear lace. Even more problematic are underwires: the movement can bend them, they can break through the fabric, and end up in the drum like small metal pins.

Once loose, these wires scrape along the inside surface, leaving scratches, and at high spin speeds they strike metal like tiny hammers. In the worst case, they slip through the drum perforations into the outer tub and jam the pump or heating element.

"A single bent bra underwire can both ruin the bra and trigger expensive damage to the machine."

How to protect bras and the drum

• always put bras in a laundry mesh bag
• fasten the hooks so they can’t snag
• choose a delicate programme with a low spin speed
• avoid the tumble dryer; dry flat instead

If you own particularly expensive lingerie, take it a step further and hand-wash it in lukewarm water. It takes a few minutes longer, but it can noticeably extend how long those pieces last.

Problem 2: Shoes - when the washing machine turns into a vibration plate

For convenience, trainers and canvas shoes are ending up in washing machines more and more often. It does work - but those heavy soles turn into rolling battering rams. They slam into the drum and the door glass, make the machine “walk”, and create severe imbalance.

For the appliance, that means faster bearing wear, stress on the suspension, and electronics that keep detecting imbalance and cancelling spin cycles. The shoes don’t come out well either: glued sections can come loose, cushioning parts can deform, and leather or faux leather may crack more easily.

Cleaning shoes safely - what to do

• only wash shoes in a sturdy wash bag or a dedicated shoe-washing box
• add 1–2 large towels to cushion the impacts
• set a low temperature and reduced spin speed
• wash insoles and laces separately

Even more controlled is cleaning by hand: loosen dirt with a brush, use lukewarm water with a little mild detergent, then leave to air-dry - not on a radiator, as heat can warp adhesives and materials.

Problem 3: Wool - a normal programme can shrink your favourite jumper to child size

Wool plays by its own rules. Heat and vigorous agitation make the fibres lock together, causing felting and shrinkage. A standard cotton cycle can be enough to turn a perfect jumper into something tight and stiff.

There’s more: wool fibres are naturally elastic, but they lose that spring when they’re compressed, twisted or spun too hard. Afterwards, the garment can look “tired”, hang unevenly and feel itchier.

"Wool isn’t just delicate - it takes it personally when it’s treated like a T‑shirt."

The right care for woollens

• always use cold or at most hand-warm water
• use a wool or delicates programme
• use a dedicated wool detergent, not biological or heavy-duty detergent
• spin very gently, ideally at low rpm
• never wring; press in a towel and dry flat

If you’re unsure, treat the care label as non-negotiable. Terms like “hand wash” aren’t decoration - they’re clear warning signals. A gentle wool programme can sometimes work anyway, but there’s always a small risk.

Problem 4: Waterproof textiles - hidden weights in the drum carousel

Membrane jackets, waterproof trousers or outdoor over-trousers have a tricky characteristic: they don’t let water pass through, but they can store it in folds and chambers. During washing, their weight can rise rapidly - and during spinning, that load often slides to one side.

The result: the drum becomes badly unbalanced, the machine “hops”, spin cycles stop, and the mechanics are put under unusually heavy strain. At the same time, the fabric can be damaged by the wrong products - for example, fabric conditioner, which can attack the protective layer.

Washing waterproof fabrics properly

• wash only a few items at a time
• set gentle spinning that ramps up in stages
• do not use fabric conditioner
• use a specialist reproofing treatment if needed
• air-dry, or briefly reactivate in the tumble dryer if the manufacturer allows

If you notice the machine getting unusually loud or moving a lot during spinning, stop the cycle, rearrange the items and reduce the load. That keeps stress on the appliance within safe limits.

Quick everyday cheat sheet

Textile	Main risk	Recommended solution
Bras	bent underwires, scratches in the drum	laundry mesh bag, fasten hooks, gentle programme
Shoes	heavy impacts, imbalance, loss of shape	protective bag, towels for cushioning, low temperature
Wool	felting, shrinkage, loss of elasticity	wash cold, wool programme, dry flat
Waterproof fabrics	trapped water, drum imbalance	small load, gentle spin, no fabric conditioner

Why a little extra effort makes financial sense

A new washing machine can easily cost several hundred pounds, and a repair visit from an engineer often runs into three figures. Against that, a few simple tools go a long way: a laundry mesh bag, a shoe bag, and specialist detergents for wool and technical clothing. These usually cost only a few pounds to a couple of tens of pounds, yet they can save real money over time.

There’s also the emotional side: a wool coat that has shrunk and no longer fits, or trainers that become unwearable after the wrong wash, are rarely replaceable one-for-one. Sorting items deliberately and choosing the right programmes can significantly extend the lifespan of each piece.

Practical routines that make laundry easier

It helps to set up a small “laundry zone” at home: a basket for delicate items, with mesh bags inside, plus a separate section for wool and technical clothing. That way, these items don’t end up in the standard wash in the first place. Many people also stick a short list on the machine - programmes that suit certain textiles, including the maximum spin speed.

If you quickly check before starting whether there are bras, wool jumpers, shoes or waterproof jackets in the basket, you’ll protect both the machine and your wardrobe. The key question before every cycle is: does this item behave like a normal T‑shirt when it’s wet - or does it bring weight, metal, special fibres or trapped water that deserves special treatment?