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How long should I keep something immersed in StarSan/swish it around for to ensure that it's as sanitized as I could reasonably hope it'll be?

I know everyone has a rule of thumb for this (I use 1min myself), but I was wondering if there are any hard numbers (culture tests or contamination rates etc) for this. How long does StarSan take to effectively sanitize something (clean plastic or metal)?

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up vote 7 down vote accepted

Charlie Talley from StarSan has said that 30 second contact time is 99+% effective. That is based on tests that they've done. Immersion isn't necessary. I keep StarSan in a spray bottle and just spray things down, wait 30 seconds, and use them.

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Here's a link to the show. thebrewingnetwork.com/shows/The-Sunday-Session/… – mdma Apr 24 '12 at 17:10
Exactly. There is no rule of thumb, its the directions for the product. – brewchez Apr 25 '12 at 0:44

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