I believe the ratio it 1:10 (betadine:water) you want the water to be a light tea color. 5-10 minutes is enough. if your BP was in worse shape I would say longer, but the betadine baths are just a preventative measure at this point.
Besides that I would hold off on handling her except when needed to check her and things like that.
Your on the road to recover now, it might take a week or so but there shouldn't be any permeant damage.