Do you have a link/guide? They've been cleaned, but I'm willing to give it another shot. I've also taken them into the Apple Store where they proceeded to tell me they are "working 100% fine". They're also a few years old already, so I'm not as annoyed as I would be if I felt like they were still new.Check that the mic ports are clean. If they get clogged they can't "hear" the noise in order to output the corresponding waveform that cancels it out.