These 4 textiles should not go in the washing machine

Many people automatically choose the standard cycle, throw “whatever” into the drum and press start. This may seem fine for weeks or months, until the washing machine begins vibrating violently, cancels the spin cycle or a favourite jumper emerges two sizes smaller. In most cases, these mishaps are not caused by a faulty appliance, but by treating delicate textiles incorrectly. Some items simply do not belong in the machine, while others can only be washed there under specific conditions.

Why some textiles put real strain on the drum

The drum may look sturdy, but it is not a steel vault. During every cycle, the machine speeds up, slows down and starts again. Anything hard, heavy or poorly balanced acts like a small hammer inside it. Delicate fibres can also be damaged because they are not designed to withstand these forces.

Problem combination: hard items strike the drum, delicate fibres lose their shape, and water collects inside textiles, making them unexpectedly heavy.

Three warning signs should make you take notice immediately:

• unusually loud banging or rattling during a wash cycle
• a spin cycle that begins, stops or feels “jerky”
• textiles coming out misshapen, stretched or noticeably smaller

Simply starting another programme afterwards will only make matters worse. It is far wiser to know which items cannot be treated like everyday T-shirts. The four biggest problem areas are bras, shoes, wool and water-repellent textiles.

Bras in the washing machine: small underwires, major damage

For many people, bras are items that can “probably go in with everything else”. That is precisely where the trouble starts. Hooks can catch on other garments, pull threads or tear lace. The built-in underwires are even more problematic: they can bend, work their way through the fabric or snap. All of this can happen during the spin cycle, when the drum is turning at high speed.

The metal components may then scratch the inside of the drum or knock against it. In the worst case, broken underwires can pass through the drum holes into areas that should remain protected. This is a classic reason why a washing machine may suddenly make loud scraping or clattering noises.

How to wash bras properly

The safer option requires only a few seconds of preparation:

• always place bras in a laundry bag
• fasten every hook so it cannot snag on fabric
• select a delicate or hand-wash programme
• set the spin speed as low as possible
• dry bras flat so they do not lose their shape under their own weight

Bras should generally be kept out of the tumble dryer. Heat and vigorous movement can flatten foam, stretch elastic and cause cups to lose their shape.

Shoes in the drum: convenient, but risky

Putting trainers or sneakers in the washing machine with your clothes may be tempting. Anyone who has tried it knows the result: the appliance suddenly sounds like a concrete mixer. With every rotation, the soles hit the drum hard, placing far greater strain on the bearings and suspension.

The shoes themselves can also suffer. Glued sections may come apart, cushioning components can lose their shape, and leather or faux leather may crack more quickly. While many materials used in modern shoes can cope with moisture, they cannot withstand continuous tumbling in a water-filled drum.

When shoes can go in the washing machine – and the rules to follow

If you are washing sturdy canvas sneakers or trainers, a little preparation can prevent considerable damage:

• put the shoes in a strong laundry bag or dedicated shoe-wash bag
• add a few towels to cushion the impacts
• choose a low temperature, either 30°C or cold
• use a low spin speed
• wash insoles and laces separately

High-quality leather shoes, smart shoes and heavy boots should never be machine-washed. A brush, lukewarm water and a mild cleaning product will do a better job here. Once cleaned, shoes should be left to air-dry, rather than placed on a radiator or in a tumble dryer.

Wool on a standard cycle: the quickest route to child size

Wool is more sensitive to heat and movement than almost any other everyday material. High temperatures and vigorous rubbing cause the fibres to felt. The result is a favourite jumper that becomes shorter, tighter and rough to the touch. Many people have experienced this accidental “transformation” - an ordinary cotton wash cycle is enough to cause it.

Even moderate temperatures can damage wool. Combined with a high-speed spin, they cause the fabric to shrink and compact, leaving the jumper without its elasticity. This cannot be reversed.

Washing wool correctly to keep it soft and shape-retaining

Anyone wishing to protect wool garments should follow three basic rules:

• always select cold water or a dedicated wool programme
• use only wool detergent or delicate-wash detergent
• keep spinning very brief and at a low speed - or leave it out altogether

Wet wool should never be wrung out or twisted. Doing so stretches the stitches and distorts the shoulders, sleeves and hem. Instead, place the garment in a towel, press it gently and then dry it flat, for example on a clothes airer.

Water-repellent textiles: hidden weight, serious imbalance

Technical jackets, waterproof trousers and outdoor coveralls have one particular characteristic: water does not pass through them easily. This is excellent when they are being worn, but it can be problematic in a washing machine. Water can collect in folds, hoods or inner sections without draining away quickly.

When water pools in the fabric, a single item can suddenly become extremely heavy - throwing the entire system off balance during spinning.

The machine detects the imbalance, attempts to redistribute the load, restarts the spin cycle several times or stops it altogether. At the same time, the mechanism is put under strain because the drum drive repeatedly has to work against unevenly distributed weight.

How technical clothing can still be washed in the machine

A few straightforward measures can substantially reduce the strain and protect the water-repellent layer:

• wash no more than one or two items per load; do not fill the drum
• use a gentle or technical-fabric programme with a moderate spin
• avoid fabric conditioner, as it can weaken the water-repellent treatment
• if necessary, reproof the garment after washing with a specialist waterproofing product

Many manufacturers advise running an additional rinse cycle to remove detergent residue. This helps membranes remain breathable to water vapour while still repelling water from the outside.

How to tell whether a textile is genuinely machine-washable

These four problem groups show that not every garment can cope with a standard programme. A quick check is enough to prevent most mistakes:

• Check the care label: take hand-wash symbols, crossed-out wash tubs and low-temperature instructions seriously.
• Inspect the components: underwires, hooks, hard soles, large buckles and zips should be secured or dealt with separately.
• Consider the material: wool, silk, viscose and fine lace always require a gentle setting.
• Assess water absorption: wash anything that can retain a great deal of water, such as thick jackets or padded items, on its own where possible.

Keeping these points in mind not only protects the washing machine but also extends the life of your clothes. It can also prevent costly replacement purchases, because favourite items will stay looking good for much longer.

Practical guidance: when hand-washing is genuinely worthwhile

For bras, very delicate laundry and high-quality wool in particular, it is worth spending a few minutes at the sink. A bowl of lukewarm water, a little delicate or wool detergent and five minutes of soaking time will usually be enough. Press the item gently through the water, rinse thoroughly and place it in a towel - job done.

For people short on time, a combination approach can work well: wash especially delicate items by hand and put robust everyday clothing in the machine. Understanding your washing machine’s programmes and selecting them carefully reduces the risk of expensive appliance damage and avoids disappointment when unloading the drum.