If I have used my hoses/siphon/bottling bucket with a beer that was contaminated sour, and I cleaned them really thoroughly with PBW and then starsan, will my next batch of beer become contaminated sour?
I might have not even cleaned it with anything more than Oxyclean/One Step. I have since switched to Idaphor. But I'm pretty sure it was just cleaned with One Step. And while One Step sanatizes it takes to long at 10 min. Give me a contact sanatizer any day. Star san being a sanatizer should do better than me and Onestep.
Others have said that you should use seperate equipment for sours and regular beer. And it is probably safer. But a yeast is still just a yeast, and should die from the sanatizer all the same. The problems might occur if there are scratches or something - although I have a few mild scratches and no problems there yet either.