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A simple 20p mouthwash hack could help banish bad smells from your washing machine, according to an appliance expert. Homeowners are being told to pour around 100ml of mouthwash directly into the drum before running a hot cycle to help tackle lingering odours caused by bacteria and mould build-up.

The unusual cleaning trick was revealed by appliance expert Michael White, who said the antibacterial ingredients found in mouthwash can help freshen up washing machines and reduce the bacteria responsible for unpleasant smells. Michael explained: "Pour around 100ml of mouthwash directly into the drum before running a hot cycle.

"When this is complete, load the machine, add your detergent and choose your cycle as normal. Adding mouthwash every two to three weeks can help keep the drum fresh and reduce odours."

The hack is said to cost as little as 20p per clean depending on the mouthwash used. Experts warn many people overlook regular appliance maintenance, which can lead to smells, poor performance and costly repairs further down the line.

Michael said: "Most appliances work incredibly hard every day but poor maintenance is one of the biggest reasons appliances fail early. Appliance faults are typically the result of residue, odours, or build-up affecting how well it works.

"Simple cleaning habits using everyday household items can significantly extend the lifespan of an appliance and help homeowners save money on repairs in the long run."

The expert also warned people not to ignore a hidden filter found in many tumble dryers. The secondary filter, usually located at the front bottom of the machine, can collect large amounts of lint and often goes unnoticed.

Michael said failing to clean it properly could become a serious fire hazard. He explained: "Cleaning the 'hidden' feature on your tumble dryer is crucial. Failing to do so can result in your appliance not working correctly.

"You may notice your clothes are still damp when the cycle is finished. Most importantly, if it's left too long without action, excess lint can become a fire hazard."

Experts recommend removing lint with a small brush or vacuum nozzle before rinsing the filter under warm water and drying it thoroughly before replacing it.

Michael White is Head of Buying and Marketing at appliance retailer Marks Electrical.