(MOSTLY-OFF-TOPIC:) I used both PVI and CHG in the past, and I currently use CHG exclusively. After applying CGI for an adequate time, I wipe with an alcohol pad to remove the CGI before proceeding to the Skin-Prep. PVI is the "orange stuff", widely used as a disinfectant for minor surgery (and major surgery too) within the USA. PVI is over-the-counter at any drugstore, but it's much more likely to cause allergic reactions. CHG is a colorless chemical, but always has artificial color added so that it's users can see that the liquid is an unnatural chemical. My prescriptions have been filled in both "bright pink" and "ultra-blue" colors.) The cost is very low, but it does require a Script in the USA. AFAIK, nearly all of Europe has switched from PVI to CHG to avoid the allergy risk. Both are highly effective; you need to merely keep the application in liquid state for at least 30 seconds.