When i was racking my beer, i noticed a few streaks in the beer that looked kind of like oil floating on water. It was kind of shiny and rainbow like. The beer tastes fine. I was planning on rinsing the yeast and reusing it for my next batch, but now i am not sure.
Can someone look at the attached image and tell me if they see anything to be concerned about?
Can someone look at the attached image and tell me if they see anything to be concerned about?