Fast Degrading of DB-FastFAME 30m Column

What must have happened? - I got a DB-FastFAME 30m column and in less than 3 months the chromatography is bad (poor resolution of 37 FAME reference mix). Only condition that changed was removing the column from an older GC (5890 fitted to a 5972 MS) to the newer 6890N fitted to 5975 MS

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