Monster thread on Homebrew Talk
about the pros and cons of Star San and iodophor. Seems some people don't like the bubbles from star san but and iodophor stains, but it won't corrode metal which star san will. As I don't use any metal post boil I'll stick with star san which has the added bonus that you can put it in a spray bottle which makes it really easy to use and economical.
One thing I didn't realise is that as long as something is still wetted with either star san or iodophor it keeps killing the bugs.
I also use star san to fill siphons which I can't imagine doing with an iodine based sanitiser.
For the old-one two on the infection I'll try bleach / vinegar (not mixing them directly of course) but I might try the amphoclen if that doesn't work.