Take good care of your strings . . . . and they'll go dead anyway.
I've tried everything and never been able to disprove this. I'd thank God for such a deal, use 'em up fast since you stole them, then go on from there.
And after all these years, I'm convinced (strictly from an intuitive sense) that it's not contamination from bodily contact, environment, etc. I think it's a mechanical deformation of the different windings against each other, the core, maybe a metal fatigue sort of thing. On the other hand, I gave up on RotoSounds as I'd get sets that were just honkin' bright, then the next set was dead right out of the bag. Then I remembered that they surely spent time at sea on container ships, salt air, etc.
Then the most aggravating thing: They sound dead to me, somebody picks up my bass and plays, and they sound completely new with a different touch ! !
J o e y