One Step is a proprietary cleaning (and somewhat sanitizing) solution that is a secret formula; even the Wine Wizard will never know exactly what it’s made out of. From what I can find out, though, it sounds very similar to products I’ve used in my wineries which often go by trade names like Peroxycarb. Essentially, these products are a basic (high pH) powder of sodium percarbonate and sodium carbonate that also releases hydrogen peroxide when water is added. The basic nature of the solution loosens scale and detritus (the cleaning action) and releases hydrogen peroxide, which is a strong oxidizer and disrupts microbial cellular function to such a degree it can repress or kill yeast and bacteria. The makers of One Step and similar products usually will give a recommended concentration and contact time in order to maximize their cell-slaying power. For One Step, it’s 1 tablespoon per gallon (4 L) of water. One Step claims, by its very name, to be a “one and done” kind of cleaner and sanitizer. From what I can learn about it, it is
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