synthetics degrade no matter how you store them. a few years ago a climbing rope builder tested a UIAA three fall rope stored for 8-10 years in a controlled temp and humidity vault. failed on the first fall.
a lot of guys tossed out "retied ropes" and didn't even use them for raps after that.
a lot of guys tossed out "retied ropes" and didn't even use them for raps after that.