Blue booger

[Ramblinleo]

So, after a spirit run with a new recipe, I started to see these "blue boogers" appear in some of the later jars. My thought is that it's some oxide off of the copper. Any body who's dealt with this before; am I correct about what it is?, can this be filtered out?, If so, can I keep it for adding to the final spirit?, if not, is the entire run bad? Thanks for any help or advice anybody can offer. I'll try to add a photo as well.