Toilet limescale can be incredibly tricky to remove once it has built up over a long period of time. It not only spoils your bathroom's appearance, but it can also clog up pipes.
There are many popular ways that claim to be able to get rid of limescale, from vinegar and baking soda to lemon.
But after a woman came forward with a bad toilet limescale problem, fans of the cleaning sensation Mrs Hinch, or Sophie Hinchliffe, have suggested using something even more unusual.
The woman took to the Mrs Hinch Cleaning Tips Facebook page to ask for advice. Sharing a picture of a toilet, which had a build-up of nasty limescale around the rim, she explained that she had tried all sorts, but nothing seemed to help.
She said: "A family member died recently and I have been cleaning her house before it is sold. I just can't seem to remove this limescale from the toilet.
"I have tried Kilrock, Harpic black, white vinegar mixed with bicarbonate of soda, WD40 and scraping with copper coins. Any ideas please?"
While some suggested cleaning products like Astonsh mould and limescale remover or HQ limescale remover, others said to use something more readily available in homes – Coca-Cola.
One person said: "Try Coke. Put a bottle of Cola all over the toilet pan, leave overnight."
Another agreed, saying: "Pour a bottle of Coke in there and leave overnight."
According to Coca-Cola's website, the product contains a "small amount" of citric acid, which is why some people use it to clean things like toilets.
Coca-Cola varies in price from shop to shop, but you can pick up a 1.25litre bottle in Tesco for £2.
It says: "Rumour-mongers have claimed that Coca‑Cola, due to its acidic nature, can be used to clean toilets and corroded car batteries, loosen rusted bolts and remove rust spots from car bumpers, get rid of grease from clothing and clean road haze from windshields.
"It's true there is a small amount of edible acid present in Coca‑Cola – just as there is in many foods and drinks. And it’s quite possible that this edible acid could do the things the rumour-mongers claim."
However, while it might work, Coca-Cola suggests sticking to "regular cleaning products".
Have you ever used Coca-Cola as a cleaning product? Let us know in the comment section below.