got to the point that even new jar lids, and a good cleaning with soap and even bleach solution would not prevent spoilage of the next tobacco.
also discovered that the jars seemed to be prone to condensation inside in winter
That's very odd and doesn't quite make sense. The only things that I can possibly imagine is that there's a contaminant somewhere in your process, the lids are not sealing on the jars, or you're storing them in conditions where they are subject to drastic climate changes.