A Mrs Hinch fan has shared her savvy trick to stop flies coming into your house and it'll only cost you around 10p.

Over the last few weeks the country has enjoyed a heat wave, with temperatures soaring above 30 degrees.

This means many of us have been opening our windows and doors to let a cool breeze come inside.

However, with windows and doors open this has led to some unwelcome visitors - flies.

Pesky blue bottles, irritating fruit flies and plant-guzzling green flies can be rife at this time of year.

But, one woman has shared a genius hack to keep the buzzing pests away, the Daily Star reports.

Alison Turnball Halliday shared her trick with fellow cleaning-fans on a Hinching Facebook page.

She wrote: “I've seen a few people mention on here about a bag of water with coins in to stop flies from going in the house.

“Today I decided to give it a go.

“I had nowhere to hang the bag so just put it on the ground.

“The doors have been open since 7.30am and I haven't had one fly in the house – even when making food.

“It’s a big thumbs up from me.”

That’s right.

All you need to do is fill a ziplock, or other plastic, bag with some water and some spare change.

About five 1p or 2p coins should do it.

Then, wither peg it up somewhere or leave it on the ground by the entry.

And there you go, no more flies…

But, how does it work?

Well, one person has a scientific theory about why the trick could scare flies away.

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They said: “My research found that the millions of molecules of water presents its own prism effect, and given that flies have a lot of eyes, to them it's like a zillion disco balls reflecting light, colours and movement in a dizzying manner.

“When you figure that flies are prey for many other bugs, animals, birds, etc., they simply won't take the risk of being around that much perceived action.

“I moved to a rural area and thought these ‘hillbillies’ were just yanking my city boy chain but I tried it and it worked immediately!

“We went from hundreds of flies to seeing the occasional one, but he didn't hang around long.”

What has the weather got in store for you? Check the forecast in your area.

Commenters on Alison’s post were impressed by the hack.

More than 2,000 people liked the post and 1,000 took the time to leave a comment too.

One person said: “Works for me I’ve done it for a few years now.”

“How have I never heard this before? I hate flies,” commented a second.

A third added: “Works for me I’ve done it for a few years now.”

Now, that's a smart cleaning hack.