Please do not take this as a personal attack, however it is important to correct misconceptions about cleaning that advertisers have managed to turn into urban myths.
Eliminate germs ?
Well for about 0.1 seconds the surface might be germ free , but unless you are wearing steralized over boots and coveralls you will walk in around 200,000 germs onto the clean wet surface with every step and because about 2/3 of them need moisture to multiply they will quickly recollonize the floor to be at exactly the same or higher volume than they were before you started.
Unless the air in the barn is triple filtered then there are about 100,000 germs in every cubic foot of air space, some of which will come into contact with the damp floor and multiply like crazy.
If germs were big enough to be seen with the human eye you would not be able to see your own fingers, that is the volume of them that is in every breath that you take.
People's time would be better used reading facts that have been tested & proven true that are published by recognised scientific organizations that PR sites set up by product vendors
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4515362/.
And these numbers are for germs, most of which are beneficial, they do not include dust , pollen , spores & micro plastic fibres.
Have a little think about it, if germs were so dangerous and we really needed germ free environments to live, then people would have died out thousands of years ago.
Not too many generations back your ancestors were born on dirt floors and the only cleaning materials that had was a broom, usually made from thatch gathered from the fields.
By virtue of the fact that you are here the "germs" they were exposed to were not fatal and in fact made their bodies & immune systems stronger.
Steam cleaners have one and only one advantage over other unnecessary over cleaning devices we are killing our planet with in that they do not use posionous compounds to "clean" the surface.
And FWIW my floors are all carpeted, shed and all, usually with uplifted wool carpet I get from a carpet layer friend.
The carpet traps a lot of the heavier dirt particles and stops them being kicked up every time I walk in or a breeze blows through.
There are working pieces under the things that I am working on and when these get too grubby / oil soaked, they go out into the garden & get used under mulch around the trees.