I saw this film one time on an ale and it was the cause of a slew of issues for me that I cleared up by removing offending bucket, auto siphon and tubing from use on non-sours. I have recently done a Roselare Flanders Red and don't think I got all the auto siphon and tubing sufficiently clean, so it spread to a lager - just a light clovey aftertaste, so it is drinkable and not even noticeable to others, unless I bring it up. So, new buckets, hoses and autosiphon are on the list. For my 15 gallon primaries used on 10 gallon batches - each is undergoing a thorough cleaning and a one week PBW soak. I just happened to get two new Speidel 60L fermenters, so those will be guarded closely and cleaned meticulously. Hopefully no sporulation in the brew house, but I think I may just deep clean the basement carpet later in the fall when the heat is on in the house....you can never be too careful. I just hope that the Brett doesn't leak through the airlock or jump out into the air when racking...