I have noticed recently that when I first turn my filter on, I get a yellowish brown cloud flowing out of the returns for about 5-10 seconds (dirty DE?). I have taken the filter apart and hosed the fingers down and inspected them, but I don't see any obvious holes or tears. They look, to my uneducated eyes, to be in pretty good condition. It's hard to give them each a thorough inspection with how many there are and how closely together they are bunched.
What could the problem be?