Okay, we'll admit it, we're guilty of putting a lot of product in our hair.
But even we were surprised by just how little shampoo you actually need when giving your hair a good wash.
No wonder we tear through bottles of Tresemme like nobody's business.
Taking to TikTok to share their top tips about keeping your tresses healthy, hair expert @sarahbrawleyhair demonstrated the professional way to shampoo and wash your locks.
In the video, the TikTokker asks: "Are you using too much shampoo?
"Even with thick hair, you don't need a whole bottle."
First, they recommend making sure the hair is completely wet through, before reaching over and squeezing out a walnut-sized blob of shampoo into the palm of their hand.
The stylist then works the shampoo between their hands to build it up, before applying to the hair.
"Make sure you work it between your hands before applying, and add more water to it whilst you shampoo."
And the top tip they recommend for shiny, healthy hair? Shampooing your 'do twice.
The hair expert continued you don't need to rub the shampoo all the way down to the ends of your hair, with only the scalp really needing to be lathered up.
"Shampoo can dry the ends if you take it through the ends," they explained. "And make sure you shampoo the underneath."
The video, which has since amassed over 46,000 views on TikTok, has left viewers divided.
Some were insistent that they still needed more shampoo than just one small squirt, with one person commenting: "Girl, that's not enough for my long hair."
Another said: "Girl, I'm like Rapunzel as a human, I cannot use only that."
However, others said the trick made them realise just how overloaded their hair was with product.
"I feel like an idiot thinking I had overly greasy hair - turns out I was just using too much shampoo," one woman said.
Everyday's a school day with TikTok...
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