I have had two different bow manufacturers quote me 2-3 years on strings unless you are shooting 1500-2000 shots a month. If so, then replace every year.

Have the shoppress your bow, remove the serving and check the string over with a fine tooth comb. If they find anything....Winners Choice or Vapor Trail are excellent strings. If they don't, you should be able to get at least this season out of it.

My last PSE lasted well over 5 years with the same string.