Keep the cord waxed,I wax mine everytime I wax my string and cables!
I've replaced the cord before,if you have any mechanical ability its not that hard!
You can go to www.bowtuningtips.com and Kenny used to have a video showing how to replace the cord.
Also I emailed RIP-CORD to get a price on a new cord,and they sent one to me FREE!! and they will send you directions!