I'm guessing there isn't a consensus here, but how cold do you do it and for how long? I have a chest freezer and a temp. controller FWIW.
Any problems with the Star San freezing in the airlock?
Should I be measuring ambient for this or actual temp?
Ok. Just thought the beer may freeze at some point. Alternatively I was concerned w my chest freezer running for so long if it's measuring the beer.