5 Things You Should Never Put in Your Washing Machine

Your washing machine is one of the hardest-working appliances in your home, faithfully cleaning your clothes week after week. But many people are unknowingly damaging their machines, ruining their clothes, and even creating potential fire hazards by tossing items into the drum that simply do not belong there. Professional repair technicians say they see the same costly mistakes time and time again. Here are the five things you should never put in your washing machine, no matter what.

1. Coins, Keys, and Loose Metal Objects

It seems obvious, but loose change and keys are among the most common culprits when it comes to washing machine damage. Coins can become lodged in the drum paddles, scratch the interior, or work their way into the pump filter and cause blockages that lead to expensive repair bills. Keys are even worse, as they can chip the glass of a front-loading door or damage the heating element.

Always check every pocket before loading your washing machine, and consider using a small mesh bag for items like bra clips or metal zippers that could come loose during a wash cycle.

2. Waterproof Jackets and Raincoats

This one surprises most people, but washing waterproof garments in a standard washing machine can actually destroy their water-resistant coating and, more dangerously, cause your machine to become unbalanced. Waterproof jackets trap air and water inside their sealed layers, creating an air pocket that can cause the drum to spin erratically and potentially damage the bearings.

• Most waterproof jackets should be hand-washed only
• If using a machine, choose a front-loader on a specialised waterproof cycle
• Always check the care label before proceeding

3. Flammable Liquids or Oil-Stained Clothes

If you have clothes that have been stained with cooking oil, petrol, paint thinners, or any other flammable substance, do not put them in your washing machine. Even a small amount of residual oil can create a fire risk, especially during the high-spin cycle when friction generates heat.

• Pre-treat oil stains with a dedicated degreaser or dish soap before washing
• If the stain is from petrol or paint thinner, dispose of the garment or have it professionally cleaned
• Never risk a fire in your laundry room

4. Running Shoes and Trainers

While many washing machines have a dedicated shoe cycle, putting trainers in the drum can damage both your shoes and your machine. The hard soles can crack the glass door of a front-loader, and the constant banging during the spin cycle can loosen internal components over time.

• If you must wash trainers, use a mesh laundry bag and put them in with towels to cushion the impact
• Better yet, clean them by hand using warm soapy water and an old toothbrush
• This preserves both your shoes and your washing machine

5. Too Much Detergent

While technically not something you physically put in the drum, using too much detergent is one of the most common and damaging mistakes people make. Excess detergent creates excessive suds that can overflow, trigger error codes, and leave a residue on your clothes that actually attracts more dirt. Over time, the buildup can also clog the drain pump and create a breeding ground for mould and mildew inside the drum.

Always follow the manufacturer recommended dosage. Modern washing machines and detergents are far more efficient than older models. You typically need far less detergent than you think, especially if you have soft water.