First of All: What Is a Probiotic Cleaner? Using a unique combination of fermented bacteria, probiotic cleaners ultimately create compounds known as bio-detergents, which break down dirt and grime.

It’s a good time to be a symbiotic microbe. Global sales of probiotics will rise to $55 billion this year from $30 billion in 2013, according to the food and drug ingredient firm Nutralliance. And the ...