M6 SL headphone socket broken

Hi, 6 weeks ago I bought an M6 SL, and it worked fine. But after a few days, the headphone socket started to fail. The right audio channel would go silent, and after I wiggled the jack around a bit the sound came back. The sound would go away every time I moved the jack. This got worse, so I decided to RMA my player. I got it back 6 weeks later (I think they sent me a new one), and this one works fine. I used Sennheiser PMX 60 headphones with the player, but the original earphones behaved in