After a bit of advice if anyone else has had this issue. I've had my MacBook Air for just under 3 year and in the last 3 months my MagSafe cable has yellowed at the end and the cable sheath has kind of deformed so the cable clip won't go all the way to the end. Possibly not explained that well so I've attached a picture. My AppleCare ends today but I'd called apple on Monday so have an existing case for this. Problem is that I can't get to an Apple Store in the next few weeks. Apple told me I could get a replacement by post and I'd just need to send my cable back - but if they found no fault they'd charge me for the new cable. This seems to be strain relief from what I've found on the internet. Not that kern to get charged for a new cable so im wondering if anyone has had this before and if their cable was replaced by apple.