The Glow Report Hair & Skin Expert Review 5 min read

5 Reasons Why Your Expensive Shampoo Isn't Working (And the Fix Nobody Talks About)

You buy better products. You eat healthier. You do everything right. And yet - dry hair, flaky skin, more hair in the drain every morning. Here's why.

Dr. Emily Carter, Trichologist
Dr. Emily Carter, BSc MSc
Trichologist & Hair Science Researcher
5 min read Updated: May 2026
10,000+ happy customers
4.8/5 average rating
30-day money-back guarantee

"I do everything right. Good products, healthy diet, enough sleep. And yet - my hair is drier than ever." If that sentence feels like you wrote it yourself, keep reading. Because the problem isn't your routine.

Thousands of women know this frustration. They invest in Olaplex, keratin treatments, hair masks, anti-frizz serums - and still, their hair stays dull and dry. Their skin feels tight after showering. They find more hair in the drain every morning. Sound familiar?

I looked into the research. And what I found changes how you'll think about your morning shower forever.

Read all 5 reasons. #4 is the reason thousands of women overhauled their entire routine.

Woman in shower
8 minutes a day under unfiltered tap water. What is it actually doing to your hair and skin?
1

You're showering in chlorine every day - the same chemical that gives pools their smell

Water companies add chlorine to kill bacteria. Makes sense. But that same chlorine reacts with the proteins in your hair and the lipids in your skin. The result? Stripped strands, an irritated scalp, and flakes that look like dandruff but aren't.

The difference between a pool and your shower? In a pool, you rinse off. In your shower, you stand in it. Every morning. 365 days a year. For an average of 8 minutes.

365x
Per year exposed to chlorine
2,920
Minutes per year under chlorinated water
98.7%
Can be filtered with the right system

"Chlorine exposure has been associated with changes to hair protein structure and lipid content of the skin barrier, which may contribute to dryness and breakage over time."

- International Journal of Dermatology

But wait - it gets worse. Look at what else may be hiding in your water...

Hair products on a shelf
The average woman spends hundreds a year on hair products. What if the products were never the problem?
2

You may be spending hundreds on products that can't reach their full potential

This is the painful part. That Olaplex No. 3 you use every week? That keratin treatment? They're trying to repair damage that may get re-done every single morning.

Think of it this way: your products aren't bad. Your water may be working against them. Chlorine and heavy metals can coat your hair and affect your pores - and every product you apply may sit on top of that layer instead of absorbing properly.

Do the maths

Deep conditioner, anti-frizz serum, scalp treatment, salon visits every 6-8 weeks... That could add up to hundreds per year on products fighting damage that may be completely preventable. Your products may finally reach their potential when your water is cleaner.

And it's not just money. It's that frustration of: I do everything right, so why isn't it working? Recognise that feeling? Then reason #3 is the proof you need.

What you see in reason #3, you can't unsee...

Showerhead close-up
After 4 weeks of filtering: this is what you don't see in your shower water.
3

The filter that turns brown - that's what was in your water

This is where it gets real. Shower filter users share photos of their filter cartridge after 4 to 8 weeks. What started white has turned brown to dark yellow.

That brown? Heavy metals, limescale, chlorine residue, and sediment. Things you can't see with the naked eye - but that land on your hair, your skin, and your scalp every single day.

It's the same principle as a Brita filter in your kitchen. Except nobody thinks about the fact that the water from your showerhead is the exact same unfiltered water you'd never drink straight from the tap.

"I couldn't believe the brown filter was everything I'd been washing my hair in. I sent the photo to three friends - they all ordered one the same week."

- Sarah M., Verified Buyer

OK, so the water is dirty. But how fast do you actually notice a difference? That's reason #4 - and it's why you're reading this.

Don't want to wait? 10,000+ customers already made the switch.

Shop Cleansii Rain Shower →

Free shipping on all orders

Woman with healthy shiny hair
Week 4: many users report softer hair, healthier-feeling skin, and less hair in the drain.
4

Many users notice a difference in days - not months. Your stylist may notice before you do.

Most hair products promise results in 6 to 12 weeks. Because they treat symptoms. But when you address the source instead of masking the symptom, many customers report changes much faster.

Week 1
Water may feel softer. Post-shower tightness may reduce. Chlorine smell gone.
Week 2-3
Skin may stay more hydrated. Less scalp irritation reported. Hair may feel softer.
Week 4+
Many customers report visible shine. Less hair in the drain. Someone may ask what you changed.

"I spent hundreds on Olaplex, Kerastase, hair masks. Nothing lasted more than one wash. Installed this in my rental flat in 2 minutes. After two weeks my hairdresser noticed a difference. I wish I had tried this sooner."

- Sarah M., Verified Buyer

"I was sceptical. Again, another product that promises to fix everything. But my husband noticed after 5 days. That never happens."

- Amy W., Verified Buyer

But not every filter works. Reason #5 may prevent you from making the same mistake thousands of others already did...

Water filtration close-up
Not all filters are equal. The difference is in the technology inside.
5

Why that cheap Amazon filter did nothing - and what to actually look for

If you've tried a cheap filter from Amazon that did nothing - you're not alone. Most cheap filters stuff 15 random materials in tiny amounts, too little of each to actually do anything. They look impressive on the listing. They do nothing in your shower.

What actually works is KDF-55 - a copper-zinc alloy designed to neutralise chlorine through an electrochemical reaction. Not through absorption (which saturates fast), but through a chemical conversion that keeps working. Combined with Calcium Sulfite and Coconut Activated Carbon in a true multi-stage system, it is designed to reduce up to 98.7% of chlorine from your shower water.

The difference between a concentrated KDF-55 filter and a cheap Amazon filter? The same difference between a Brita and a tea towel over your tap.

What to check before you buy

Ask these 4 questions: Does it contain concentrated KDF-55? Does each stage have enough material to actually work? Are there real, verified reviews from real people? Is there a hidden subscription? If a filter can't answer all four - save your money.

Passes all 4 checks

The filter this article is about

CLEANSII
FILTERED RAIN SHOWER

15-stage rain shower filter with concentrated KDF-55 technology. Designed to reduce up to 98.7% of chlorine, heavy metals, and impurities. Fits any standard shower connection - even in a rental. No tools. 3-minute install.

15-stage filtration KDF-55 technology Up to 98.7% chlorine reduction 3-min install, no tools

We know what you're thinking. We heard it from thousands of women before you:

30-day money-back guarantee
No questions asked. Full refund.
No subscription. Ever.
No surprise charges. No fine print.
Fits any shower
Rental flat? No problem. No plumber needed.
10,000+ happy customers
4.8/5 average. Real reviews from real people.

What customers are saying

★★★★★
"My skin used to feel so tight and dry after every shower. I thought it was just my skin type. Tried this after my friend recommended it. The tightness felt noticeably less from the first shower. My moisturiser feels like it absorbs better now."
Jessica T. Verified Buyer
★★★★★
"I bought a cheap Amazon filter first. Total waste. This one feels different. I notice a change in the water itself. My colour-treated hair seems to hold up longer between appointments now. Already sent the link to three friends."
Emma R. Verified Buyer
★★★★★
"Week 1 the water felt different. Week 3 my hair felt different. Week 5 my husband noticed. That never happens. I am keeping this thing. Already on my second filter."
Amy W. Verified Buyer

Individual results may vary. These testimonials reflect personal experiences and are not guaranteed outcomes.

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Try it. 30 days to decide.

If you don't feel a difference in your hair, your skin, and your shower, send it back. Full refund, no questions asked.

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