After a couple lacto infected batches I bleached my fermenters. My old procedure (pre-StarSan) was to rinse with a bunch in cold water, then warm it up and use hot, then cool it down and use cold again until I could not smell any bleach.
Well, with my recent return to using some bleach, it dawned on me that we use camden tablets to remove bleach and chloramines from our brewing water, so I thought, let's give that a shot for a rinse aid. I did a normal cold water rinse, and could still smell some bleach I took a pinch of camden (I have metabisulfite powder) and put it in the carboy with a couple cups of water, put a cap on and gave it a good shake. I drained and rinsed and NO bleach smell. A little bit of sulfur though. This was followed by a normal StarSan sanitizing and no sulfur aroma was left over.
This is not something I would do routinely, but for the occasional thorough cleaning followed by aggressive sanitation this appears to work well. Lactobacillus will form spores that are difficult to kill and I'm suspicious this was my culprit as I had autoclaved everything else. Bleach will kill the spores where many other sanitizers will not. So far so good.