I know strings don’t have expiration dates on the package, but was just curious if anyone on the forum has experience with unopened strings that may have been around for several years. I’m going to be given a few sets of strings this coming weekend that have been around for a while…maybe even 15 years or so…and still unopened!
I guess if they are all rusty or rough in texture, I’ll have may answer immediately…but hate to spend the time changing them only to realize they will need to come right back off and replaced. 
), but it makes perfect sense and would not be an expensive process to add when packaging. I’m sure the string makers would prefer I just toss them and buy new, though.