I have been a long time user of iodophor sanitizer but just recently I decided to give Star-San a try due to its re-usability and stability. I sanitized my bottles with the directed concentration of sanitizer solution, not fearing the foam as so commonly stated, and filled and capped as usual. After a few days I opened a bottle to evaluated how the beer was doing and noticed that there were a few spots of shimmery, oily film like deposit on the surface of the beer in the glass. These spots were small, less than 1/16" in dia and I did not notice any off flavors.
Now, approx 1 week into the conditioning, I’m noticing a precipitate in the bottles that sometimes sticks to the sides of the glass like yeast can do in a carboy. The precipitate is very small and solid and does not cause turbidity when the bottle is spun therefore the coalesced particles are very solid/bound together.
Is this from the sanitizer? or is this a wondrous new method for binding polyphenols and proteins? Or is it colonies of yeast from the conditioning phase?(this I doubt as the utilized yeast is a VERY low flocculator)
Any Ideas are appreciated…