As the weather heats up, it is only natural that Brits are beginning to sweat more and, therefore, are using more deodorant – but this combination can damage our clothing. According to Salt Of The Earth, our bodies cause a chemical reaction between sweat and the aluminium in antiperspirant, which is the cause of our sweat turning yellow and sticking to our clothes.

Many homeowners rely on bleach and laundry whitening products to remove these stains. However, a home and lifestyle expert has offered a foolproof method using three non-harsh ingredients that you can find in your kitchen cupboard to get rid of these stubborn stains. Laura de Barra took to Instagram to share her “holy trinity” hack.

She said: “My holy trinity is washing up liquid, bicarb, and five per cent distilled white vinegar. We want the t-shirt inside out, and then you want cool water. Never use hot water when working on stains. It could actually set some stains into the fabric. Work that is gently (washing up liquid) into the stain.”

By using washing up liquid, any left-over products like body lotion, oils, or deodorant are removed to tackle the stain.

Laura added: “This brown staining happens under our arms because our pits have a more liquid-rich sweat, so vinegar is perfect for tackling this.

“Just rinse the washing-up liquid off, then use two parts water to one part vinegar. Then you’re going to let the pits sit in there for an hour. Take her out. We’re going to use that vinegar later, and then you’re going to give it a good rinse.

“Then add some water to your bicarb and make this lovely face mask consistency. You’ll find this next part easy if you pop a bowl or a saucer under the pits. You’re going to load the bicarb onto the stain.”

“Bicarb is actually great at stain removal as it literally draws off. So the worse the stain, the longer you leave it. I left this for about an hour and a half.

Unlike bleach, bicarb is a more gentle abrasive, which makes it great for eliminating tough stains and shifting grime without causing any additional damage to the clothing, reported Dr Oetker.

The expert continued: “And for now, for my favourite bit, when vinegar and bicarb meet, they make this wonderful fizzing reaction, and that’s going to help release anything that’s trapped in the fibres without being too harsh on the fabric itself.”

Laura concluded: “If you find the stitch line is still stained, this is really common as it’s a denser part of the t-shirt. Just pop her into another goddess bath, washing up liquid and water, and just massage the stain out, and then you’re going to rinse. Once you’re sure the stain is gone, you can wash her as normal.”