[bob2299]

I came to the realization recently that that this must be an internal problem as I only notice the left ear piece rattling; the right ear piece never does this, no matter what source or device.
 
the problem is I don't have my receipt anymore, only a code on the jack 1910.

 

[bob2299]

It appeared to go away after trying to use the supplied cleaning tool, but the rattling is still present

 

[bob2299]

Bump

 

[sebsound]

I have the exact same thing. Also left side. I use them as a musician, and when I play distorted guitar at a decent volume, it is very noticeable.