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Do you ever get the ick when you walk into a hotel room or a rental house?
You've travelled a long way, finally put your bag down, sit on the edge of the bed... and picture the hundreds of people who have slept in it before you.
Good news. On a microbiological level, not much of them is left. Within a day that room is microbially yours. And you don't have to do anything for it.
Here's how that works.
Your home is a print of the people who live in it
Did you know every house has its own bacteria? Not from the walls or the floor, but from the people who live in it. Microbiologist Jack Gilbert (University of Chicago) found that the bacteria on your light switches are microbially almost identical to the ones on your hands. The floor to your feet. Everywhere you go, you leave an invisible piece of yourself behind.
Move to a new place and it takes less than 24 hours for the space to become microbially yours. And that goes for a holiday home too.
A holiday home carries the microbiome of everyone who ever slept there
Your own place mostly holds your bacteria. A holiday home holds the bacteria of dozens of families who came before you, each with their own unique microbiome. That may sound uncomfortable, but it really isn't that bad. In nature, a diverse mix of micro-organisms is a sign of health rather than danger. Children who grow up in daycare, exposed every day to the bacteria of dozens of other children, build a more robust immune system than children raised in an environment that is kept too sterile.
But, and this is where it matters, not all bacteria belong everywhere. Some bacteria that are perfectly fine in your gut have no business on your kitchen counter. And in a damp holiday house, by the sea or up in the mountains, moulds thrive more easily than they do at home. The damper the room, the more micro-organisms survive and grow on surfaces.
Pouring bleach over everything doesn't solve that. Because an empty surface doesn't exist. The moment you finish cleaning, it gets colonised again. By what floats in the air, sits on your hands, clings to the soles of your shoes. The question is never whether something comes back. The question is what.
Whoever gets there first, wins
In microbiology this is called competitive exclusion. Bacteria that occupy a surface keep others out. They take up the available space and nutrients, so there is simply nowhere left for unwanted newcomers. Whoever is there first decides who gets to stay.
That is exactly why repetition matters so much with YOKUU. Lab research by FW Bioconsult put YOKUU spores on surfaces and tracked what weekly use did compared to a single application. Both with YOKUU.
Both lines are YOKUU. The only difference is how often you use it. With a single application a small population of good bacteria settles on the surface, but it stays low and doesn't build any further. With weekly use the population grows every time, until from week six it sits stable at 100,000 living spores per square centimetre. And it stays there, even if you pause for a while. The good bacteria hold the spot. Unwanted microbes, like moulds and gut bacteria that have no business on a surface, find no room left.
It is not a product that works while you use it. It is a product that works better because you keep using it.
Invite 1 billion cleaning helpers into your home
Every YOKUU product is full of living Bacillus bacteria. The good kind, food-safe and studied scientifically for years. They settle on the surfaces you touch most, actively work against specific unwanted microbes and improve the microbial biodiversity in your home. Not by emptying everything out and hoping nothing comes back. But by putting something better in place that takes the spot.
At home that works better every week. In a holiday home it is a flying start.
Quick answers
Is a holiday home dirtier than my own house?
Not really. Its microbiome is more mixed, because more people have passed through, and a diverse mix isn't a problem in itself. Damp rooms are worth watching, because moisture lets more micro-organisms survive on surfaces.
How long before a room becomes microbially mine?
Less than 24 hours, according to the Home Microbiome Project. Your own bacteria reach the light switches, floors and surfaces within a day.
Why doesn't bleach solve it?
Because an empty surface doesn't stay empty. Whatever floats in the air, sits on your hands or clings to your shoes recolonises it straight away. The question is what settles there, not whether anything does.
What is competitive exclusion?
Bacteria already occupying a surface take up the space and the nutrients, so there is nowhere left for unwanted newcomers. It is why whoever is there first decides what lives there.
Does YOKUU work better if I use it more often?
Yes. Lab research showed that a single application leaves a small population that doesn't build any further, while weekly use sits stable at 100,000 living spores per square centimetre from week six.
Sources: Jack Gilbert et al., Home Microbiome Project, University of Chicago (PNAS, 2014) · Frederic Weekers, FW Bioconsult - Fate and Stability of YOKUU Pearls on laminated wood surfaces (2021) · KU Leuven - Evaluation of the antimicrobial activity of YOKUU (2021, Vandecruys, Vanreppelen & Van Dijck)
