Hi guys, I'm a bit worried right now. I stop used my Sennheiser PC 350 for 4/5 month and now when I move my volume wheel to near the max volume I ear some noise like the noise of old tv or radio when as interference. The headphones only have this problem when i'm moving the volume scroll, when I have volume on max (for example) I can't hear any noise, it's only when moving the volume wheel to near the max volume. So I want to know if this can become worse in the future and if I should send it to warranty to avoid any problem that can degrade the sound quality. Thank you, Cristiano Rodrigues.