There's nothing worse than fruit going brown a few days after you buy it.
And with bananas this can be the case quite often.
Now families are celebrating after one woman posted a little known life hack on Facebook to help other.
One woman posted a photo of the tip on the Reduce Your Supermarket Spend Facebook page and hundreds of people responded saying they'd never heard of it, the Manchester Evening News reports .
Her photo showed two bananas, which she said were bought at the same time.
But while one had gone brown, the other one with foil around the stem was still fresh. Apparently cling film has the same effect.
And while you can cover the stems of a whole bunch, it's separating the bananas and wrapping the stems individually which proves most effective.
The life hacker website explains the science behind it, saying: "Bananas, like many fruits, release ethylene gas naturally, which controls enzymatic browning and ripening of not just itself, but other fruits nearby.
Much of that offgassing takes place at the stem - or the crown - of the banana. By wrapping the crown of a bunch, you slow down the ripening process a bit. For the best effect, separate the bananas and wrap them individually."
