The bands are applied to the cigars at the factory and snugged down around the cigar under "perfect" conditions. If you can easily rotate the band around the cigar at home then it is probably too dry (or at least drier than when the band was applied). Inversely, if the band is immobile and fits tight then the stick might be wet and swollen. Not a perfect method to test for humidity levels but it should give you some indication of the problem. My guess: too wet.