Dry shampoo is, in my opinion, one of the biggest wins in the beauty game. Since its arrival in the mid-2000s, it's become a staple in any bathroom or gym bag for mopping up greasy roots, adding volume and leaving hair with a fresh scent.
But if you're spraying on a whole lot whenever your hair is looking a little greasy and then hurriedly brushing out the resulting white powdery tinge, you may actually be applying it all wrong.
That's according to celebrity chef Nigella Lawson, who revealed in a new column for UK newspaper the Sunday Times her biggest piece of beauty advice is to put dry shampoo in your hair before you go to bed, rather than the next morning.
"Blast yourself with it before you go to bed and when you wake up in the morning, it will have disappeared, taking the grime and grease with it," she revealed in her column offering "four tips for an easier existence".
It means the dry shampoo goes to work as you sleep, and will only need a quick brush in the morning to be looking fresh and ready for the day.
Lawson also says that a basic, low-cost dry shampoo does just as good a job as more expensive ones - great news for those of us who swear by cult supermarket brand Batiste.
The host of Nigella's Kitchen always looks impeccable, so I'll take her word for it.
Some of her other tips included saying "no" when you're asked to do something you know you can't take on rather than just delaying because you feel guilty, and when serving dinner, just worry about getting it on the table rather than whether it's piping hot.