I have very limited experience with filtering, I'm a bit of a germaphobe. But it sounds like chill haze, which is nothing more than proteins and tannins coagulating and reflecting light. Here
is a pretty good article from BYO magazine breaking it down.
If you determine that it is not chill haze, I would recommend trying out unflavored genital technique. I have been using gelatin for 3 years and my beer are as clear as any macro commercial offering.