I'm having a problem where the blackberries I buy from the store on Sunday seem to be spoiled on Monday. On Sunday, I specifically look around the outside of the box and check if any blackberries have white fluff on them. If I don't see it then, then when I actually open the berries on Monday I will see the fluff. This is irritating because I don't know whether I am supposed to throw these out, and I buy large quantities of these berries to last me the week.
So my 2 questions are:
How do I know whether a blackberry is safe to eat? If some blackberries have that white mold on it, but the others don't, can I throw that berry out and use adjacent berries?
How am I supposed to store blackberries to prevent it from molding after 1 day? I highly doubt my grocery store will be selling moldy berries deliberately so maybe I am storing it incorrectly.