I am curious if bees will reuse pollen from old frames. I was finally able to remove some plastic frames I didn't like from a last year's nuc. In each of these frames were filled with pollen. I'm not sure what to do with them. I would like to hang on to the frames for any emergency situation being that they have drawn comb, but am not sure if it's a bad idea since they have aged pollen in them. Any thoughts?