Question:
I found a ziploc bag in my cabinet and put some fish inside. Afterwards, I noticed that there were some flakes in the bag. (The bag wasn’t in its original packaging. I guess someone used it and then put it in the cabinet). Some of the flakes/shmutz got on the fish that was for shabbos. Is this a kashrus problem that I should be concerned about? I have no reason to assume that the flakes were milchig (or not food).
Answer:
If you are sure that it isn’t an insect, and it isn’t milchig, then it should be alright.
Have a good Shabbos