I haven't had any infection either - it's just discoloring the plastic. I was thinking along the lines of like a Tupperware bowl where you put like tomato soup in. The color never comes out but doesn't impact whatever else goes in there. Is beer more sensitive to off flavor or aroma than say...
So when is it time to retire plastic brewing equipment? It came up in another thread for a minute about how some people retire buckets after 15 or so batches. I've ditched tubing once it picks up a color because it's cheap - but now I'm looking at my ale pale and it picked up some color from...
I had a lighter fluid batch - still working on what exactly happened - luckily my neighbor thought it was tasty anyhow. I was cleaning up my boxes of bottles when I found one that still had my lighter fluid brew. But after a few months - the taste was gone and somehow it turned back into beer...