"cable fraying problem" faced by a lot of MacBook users?

Couple of options

1. I have cables from 2010 - as long as they work - I use a couple of rolls of adhesive bandage - the sort used to dress wounds - to wrap around and cover the frayed areas even at a junction - has helped me increase the useful life

2. You always have the option of replacing them with an MFi certified cable (I have found Monoprice to be a good vendor)

Check the following:

The Fray Fix: The answer to The MacBooks MagSafe power cords fraying problem.

http://www.thefrayfix.com

Triple click on link to select complete line and ight click on link and select Go to address.

Kim