I'm not trying to troll or anything, I'm just trying to think the claim through using the science/logic behind it all because it really doesn't make sense to me at first thought. And of course, given I do exactly that, I'd definitely want to change how I do things if it's indeed true that there's a problem. I've searched a little for the interview but no luck, you wouldn't happen to have a link would you?
As far as I know, it was this interview, although I could be wrong.http://www.basicbrewing.com/index.php?page=basic-brewing-radio-2007
March 29, 2007 - Sanitizing with Bleach and Star San
Charlie Talley from Five Star Chemicals tells us best practices in using household bleach and Star San in sanitizing equipment.
My speculation is that once you remove the starsan there is an opportunity for things to grow. This makes sense from a strictly "what is possible" point of view, but from a "what is likely" point of view it is probably not anything to worry about. A lot of people do what you're doing without any contamination problems.
I've noticed this with thin PVC tubing I use for racking and stuff. after a few weeks sitting in a bucket of starsan (don't ask) my tubing has gone a bit milky and sort of feels a little gummy, but I'm not really sure of the science of it all, or what's happening. Anyone smarter than me care to explain? In any case, with the beer line I use, I don't notice any of the milkiness or anything, everything stays crystal clear (and also sits for months at a time), so I'm assuming it's not doing the same strange gummy thing - but you're right, I'm not opening up my tubes or touching the inside. again, hoping someone smarter than me can explain potential problems - but as far as I can tell it sort of seems ok?
The starsan is acidic enough to slowly dissolve the tube. The beer line that I use is 3/16" pvc from morebeer (http://morebeer.com/view_product/16367//Beer_Tubing_3_16%22_ID_Roll_of_100
) Maybe the line you get isn't pvc, the website doesn't say. Either way, if it isn't a problem for you don't worry about it.