Last Updated on March 12, 2025 by Giorgia Guazzarotti
“Open the cuticles with warm water before you apply conditioner. It’ll help it better penetrate your hair and make it stronger.”
If I had a penny for every time I’ve heard this advice, I’d be rich… Problem is, it doesn’t work! Let me explain…
You Don’t Want To Open Hair Cuticles!
Like all junk science tips, this too seems to make a lot of sense at first. Except that cuticles don’t really open. You can only raise them – and that’s something you want to avoid.
Here’s why: the cuticle is the outermost part of the hair shaft, the layer that protects it from damage. Think of it like the shingles on a roof: they’re meant to lie flat and protect what’s underneath. When the cuticles are damaged, hair becomes dry and brittle.
Every time you wash your hair, the water makes the shaft swell. This raises the cuticle, damaging it. The same happens when you comb your hair too harshly, rub it too vigorously or have some relaxing or bleaching treatments done.
And once those cuticles are raised, your hair’s basically defenseless. Moisture is gone in a flash. Frizz is out of control. And if you throw heat styling into the mix? Say hello to even more damage. Curly and coily hair (which naturally has a more lifted cuticle) tends to be drier and breaks more easily – there’s just nothing keeping the moisture locked in.
So if you’re thinking warm water is doing your hair a solid by “opening” the cuticles, nope. It’s actually just making them easier to mess up.
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Raised Cuticles Don’t Make For Better Conditioning
To add insult to injury, a raised cuticle doesn’t allow beneficial ingredients to penetrate inside the hair shaft. That’d be too easy.
Whether an ingredient can get inside the shaft or not depends on its size and shape. If it’s too big, for example, it stays on the surface of your hair. Some ingredients, like hydrolyzed proteins and amino acids, are small enough to slip in. But most of the good stuff in conditioners (think silicones, oils, and fatty alcohols) work by coating the hair shaft, sealing in moisture, and smoothing down the cuticle. They never penetrate your hair.
A raised cuticle is just a sign of damage. That’s why, after washing your hair, you need to use conditioner to help the cuticles get back in their place.
What Actually Helps Conditioner Work Better?
A conditioner contains ingredients that can smooth down the cuticles again. They won’t repair the damage down (hair is dead and, once it is damaged, it is damaged for good), but, with its smoothing action, it can help protect hair, make it feel soft and look healthy and shiny.
If you really want your conditioner to work better, here’s what actually makes a difference:
✅ Squeeze out excess water before applying conditioner, so it won’t get diluted (yes, this happens).
✅ Leave it on for a few minutes, so the active ingredients have time to coat your strands and smooth everything down.
✅ Choose the right conditioner for your hair type. If your hair is fine, go with a lightweight formula with proteins and amino acids to help strengthen it. If it’s thick and dry, you’ll want something richer with nourishing oils and butters.
✅ Don’t skip a leave-in conditioner or serum. These create an extra layer of protection to keep moisture in and frizz out.
The Bottom Line
So, there you go. Next time someone tells you to “open” your hair cuticles, tell them no, thanks. Cuticles don’t open. They lift when damaged, and that doesn’t do your hair any good. Period.