I've had this a long time ago and I just tossed them
- the green is oxidation and it impacts the sound.
- it's because the insulation becomes porous over time
- once that happens there is no repairing them
Replace them with Audio Envy cables
- they will outperform many higher priced brands
- provide very godo sound
- are modestly priced
- use great aulity copper (OCC)
- Use great insulation - low Dielectric Constant
If you want better cables then try Zavfino
Regards - Steve