Hissssing sound on the contact between headphone to remote

Okay, I had an old portable Sony audio remote, and when I connect my Sony MDR-V900 headphone, there is hisssssssing sound. So a few mth. ago, I ordered a brand new Sony audio remote (the remote is for my HiMD player). When it arrives, the hisssing sound is gone.

Then just recently, that hisssing sound comes back. As the audio jack of my headphone contacts to the portable audio remote,



I have to rotate the audio jack slowly and eventually there is a certain spot that I can get sound coming out from both left / right headphone.

Otherwise, it's either hisssing sound, or sound comes out from the left headphone only.

Under magnifying glass, I can't see any damage or wear / tear on the audio jack. This Sony headphone is made in Japan, but 14 yr. old.

Does any1 has any suggestion?