I’m not meaning to be alarmist or disparage the product either. My first post referred to a successful use of ONR from an Optima owner—but as a pretreatment, not an additive to the water supply. But, for what it’s worth, 1-2ml is a pretty insignificant amount and likely wouldn’t do much.
And there may even be a significant amount of Optima Steamer customers using ONR and having no issues whatsoever, just not reporting it back to us. If that is the case, we’d push them towards applying ONR through the gun bottle attachment vs an additive to the tank. We deal with customers daily who are running into scaling issues from tap water alone, and we push for clean, soft water (low mineral or softened).
As far as what someone who may (or may not) run into if they did have issues like those mentioned in my previous post, the remedy may be as simple as descaling the boiler and changing the trigger valve o-rings. I can conceive of other possible issues but won’t speculate too hard without data.
If any folks on here who own an Optima Steamer and regularly use ONR, I’d love to hear from you.