I finally used my meat grinder (for Asian chicken patties with semi frozen breasts) and a gray ooze was coming out of the middle area. I tried flicking that part out. I'd washed it well before use. Now, I'm reading reviews on Amazon about this and some people think it's a bad design and harmful. Those who called Kitchen Aid about it were told it's harmless.
Also, mine came with the plastic pusher; I'd rather have the wooden one; any suggestions on this?