I've used it on some minor stuff at 50%, used the pharmaceutical grade low-odor mixed with distilled water in a glass dropper bottle. You mostly want to make sure that the area you're applying it to and your hands are clean, because otherwise it will bring in whatever contaminant is on your skin. I suspect that may be a big reason why the FDA doesn't approve it.
I've used it on some minor stuff at 50%, used the pharmaceutical grade low-odor mixed with distilled water in a glass dropper bottle. You mostly want to make sure that the area you're applying it to and your hands are clean, because otherwise it will bring in whatever contaminant is on your skin. I suspect that may be a big reason why the FDA doesn't approve it.