The importance of wearing is well documented. It’s the non-negotiable product that all experts agree should be worn every day, rain or shine, to protect the skin against UVA and UVB rays. In turn, it helps reduce the risk of skin cancer and slow down the signs of .

“We can prevent up to 80 per cent of skin ageing by using daily sunscreen correctly, all year round,” says . “That’s a lot to play for.” SPF must be worn daily But are you wearing it correctly? Many dermatologists say we are missing the mark when it comes to proper application.

Even as a beauty editor, I spent many years of my life smearing just one pump of , and rarely applied it beneath the jawline. That is until I learned a clever method for foolproof application. “You need a quarter of a teaspoon (or 1.

25ml) of sunscreen for the face and the same again for the neck,” explains. “Or, you can use the two finger – your index and middle fingers – rule for ease. I recommend people use the 13 dot technique to ensure you cover the skin evenly, without missing bits out.

Just like painting a wall, you want (and need) an even layer.” This technique couldn’t be easier: simply dot 13 fingerprints of SPF across the face, then rub in. It’s a great way to feel confident that you are fully protected from the sun, and not under-doing it on the good stuff.

It’s also worth noting that the dose you must use to get the protection promised on the packaging is the same for all sunscreens, so even if you�.