We Got Too Clean

In 1847, women were dying in hospitals and nobody could explain why.

A Hungarian doctor named Ignaz Semmelweis was working in a maternity ward in Vienna. Two clinics, same hospital. In one, the maternal death rate was 2%. In the other, it was 18%. The only difference: the high-mortality clinic was staffed by doctors who performed autopsies in the morning and delivered babies in the afternoon. Same hands. No washing in between.

Semmelweis made a simple request. Wash your hands with chlorinated lime before touching patients. The death rate collapsed almost overnight.

The medical establishment destroyed him for it.

His colleagues called him irrational. Hospitals refused to adopt the practice. He was mocked, stripped of his position, and eventually committed to an asylum by his own peers. He died there at 47, likely beaten by guards.

It took another twenty years for Pasteur and Koch to prove germ theory and vindicate everything Semmelweis had observed. Invisible organisms were causing disease. He was right. He just couldn't prove it with the tools of his time.

That's the thing about invisible forces. We reject them until we can't anymore.

The Story That Scaled

Germ theory changed civilization. Sanitation. Sterilization. Antibiotics. Pasteurization. Antiseptics. Hundreds of millions of lives saved. It rewired how humans relate to the world around them.

But it also planted a story deep in our collective behavior: microbes are the enemy. All of them. Kill them. Everywhere.

That story scaled. We built antibacterial soaps and put them in every bathroom. We designed cleaning products that promised to eliminate 99.9% of germs. We prescribed antibiotics broadly and often. We taught children that dirt is dangerous. We built skincare routines around stripping, scrubbing, and sterilizing.

Think about your own morning. You wake up. You wash your face with a cleanser that contains surfactants. You shower with soap. You put on clothes washed in detergent. You use hand sanitizer before lunch. You come home and wash your face again.

At no point during that day did anyone tell you that you were removing organisms your body produced specifically to protect you. Because the story we inherited says removal is safety.

Then COVID made it existential.

Suddenly the entire world was thinking about invisible threats every waking moment. Hand sanitizer on every counter. Disinfectant on every surface. Masks, gloves, UV sterilizers. A global population in survival mode, armed with products designed to eliminate anything microbial.

In a pandemic, that instinct saves lives. Nobody is arguing with that.

But the instinct didn't shut off when the pandemic ended. It calcified. We absorbed it into our daily routines and kept going. We emerged from COVID more sterile than any generation in human history.

And nobody asked what we lost in the process.

What We Lost

Your skin hosts trillions of microorganisms. Bacteria. Fungi. Viruses. They're not hitchhikers. They are a functioning ecosystem that regulates inflammation, reinforces your skin barrier, competes with pathogens for resources, and produces antimicrobial compounds your immune system relies on.

When that ecosystem is diverse and balanced, skin is resilient. It handles stress. It recovers quickly. It regulates itself.

When you strip it — daily surfactants, antibacterial products, over-cleansing, constant sanitization — you don't get cleaner skin. You get fragile skin. Skin that overreacts. Skin that can't hold moisture. Skin that breaks out and flares up in ways it never used to.

Look around. Eczema rates have doubled in industrialized countries over the last 30 years. Acne is more prevalent than ever. Rosacea, perioral dermatitis, seborrheic dermatitis — conditions that barely existed at these rates before modern hygiene became what it is today.

We treat these as individual problems. A cream for this. An antibiotic for that. But what if they're all symptoms of the same thing: an ecosystem that's been systematically dismantled by 150 years of killing everything indiscriminately.

You've felt this even if you've never thought about it in these terms. Your skin was better when you were on vacation. It cleared up when you spent a week camping. It calmed down when you stopped trying so hard. That wasn't a coincidence. That was your microbiome getting a break from the daily assault.

The Exact Reverse

Semmelweis discovered that invisible organisms were killing us. That was the birth of germ theory. It taught us to fear what we couldn't see.

The microbiome is the exact reverse.

It's the discovery that invisible organisms are keeping us healthy — and that removing them is what's making us sick.

Same invisible forces. Same initial resistance from the institutions built on the old framework. Same slow, uncomfortable realization that the story we've been telling ourselves is incomplete.

Germ theory wasn't wrong. It saved the world. But it gave us a binary: microbes are bad, sterility is good. And we ran with that binary for a century and a half without ever questioning whether we'd taken it too far.

We took it too far.

The next chapter isn't about abandoning hygiene. It's about growing up past the idea that all microbes are threats. It's about understanding that your body is not a sterile environment that keeps getting contaminated. It's a living ecosystem that keeps getting stripped.

The future of health — skin health especially — isn't more sterilization. It's balance. And the people who figure that out first, in their own routines, in their own homes, with their own skin, are going to wonder why it took us this long.

We spent 150 years learning to kill germs. We got very good at it.

Now we get to learn which ones to bring back.

References

• Varga EM, Nouri-Aria K, Till SJ, Durham SR. Immunomodulatory treatment strategies for allergic diseases. Current drug targets. Inflammation and allergy. 2003.