Persistent yellow stains in your toilet bowl can make even a spotless bathroom appear grimy, but tackling them doesn't have to mean reaching for harsh chemicals or splashing out on pricey products. With just two straightforward household staples, you can break down stubborn build-up and restore your toilet to its former glory in as little as 60 minutes.

A cleaning expert on the Martha Stewart website has revealed that vinegar and baking soda are genuinely all you need. However, there's a good chance you've been using these items incorrectly. They went on to explain precisely how to clean your toilet bowl so those yellow stains disappear for good - and what's actually causing them in the first place. It turns out it's not simply limescale.

Yellow toilet bowl stains are predominantly caused by mineral deposits from hard or well water, including calcium, magnesium, and iron, which form a hardened, rock-like layer over time.

However, urine can also be a contributing factor. The acid found in urine can react with minerals from hard water to produce stubborn deposits. The longer stains are left untreated, the harder and darker they become - and if neglected, they can even lead to blockages.

Clorox in-house scientist Mary Gagliardi admitted to the Martha Stewart blog that: "Uric acid (present in varying concentrations in urine) can react with hard water minerals to form uric salts with low solubility that deposit on surfaces, resulting in yellow stains."

Before getting started, you'll need white vinegar, baking soda, rubber gloves, paper towels, and a toilet brush. The first step is to lower the water level.

This can be achieved by flushing the toilet; for a more significant drop, switch off the water supply behind the toilet and flush once more to drain the bowl further.

Next, coat the stained areas with vinegar. Vinegar-soaked paper towels will be required for any marks above the waterline. Leave this to soak for a minimum of 30 minutes, or for more stubborn stains, leave it for up to an hour or even overnight.

Pour in one cup of baking soda to trigger a fizzing reaction, leave for 15 minutes, then scrub thoroughly. Finally, turn your water back on and flush to rinse clean.

Cleaning specialist Marisol Rivera recommended scrubbing your toilet bowl once a week while giving all areas a thorough clean. Rivera shared: "The jet holes under the rim of the bowl become clogged with mineral deposits over time.

"This causes the water flow to become uneven. The buildup will concentrate in specific areas of the bowl as a result."