Plumbworld, bathroom and kitchen expert, spoke with Anne Simmons, 57, from Berkshire who worked at the palace for more than a decade. According to the cleaner, one of the most effective cleaning methods she used on bathroom and kitchen taps didn’t involve any harsh chemicals or expensive sprays.

Instead, she loved to use a simple household product that costs around £1 or less. The expert said: "We never had anything fancy. It was just always about working with what we had."

“White vinegar was our go-to. You just soak a cloth in it, wrap it around the tap, and leave it for 10 to 15 minutes.”

According to Anne, it “cuts through” the limescale and brings out a lovely shine.

The trick, she says, was to follow it up with a gentle polish using a microfibre cloth.

The expert added: “White vinegar is naturally acidic, which helps dissolve mineral deposits without damaging the finish.

“Because it’s something many people already have in their cupboards, it’s a cost-effective alternative to specialist cleaners.”

When used properly, this trick is suitable for chrome, stainless steel and many brushed metal finishes.

Anne advised checking the manufacturer’s care guide if you have a coloured or speciality coating.

She added: “People often assume the royal household relies on luxury products for everything, but we relied on practical methods that delivered results, and that anyone can use.”

To try it at home, soak a clean cloth in white viegar, wrap it around the tap and leave it to sit for 10 minutes.

“Wipe away residue with a damp cloth, and then dry and polish for extra shine.”