What is the hair-like "polymer" that condenses on the caps of the plastic cell vial? Inside vial are cells in a mixture of FBS and DMSO. The vials were frozen slowly in a special isopropanol-filled container (isopropanol does not touch the vials) to -80 degrees celsius, then put on dry-ice to move to a liquid nitrogen cryogenic freezer. The hair-like crystals appear to be water, but bend toward my finger when nearby, like static attraction between a comb and faucet stream.
The polystyrene container and your comments about the hairs moving suggest that they might be caused by static electricity.
This video shows ice crystals which formed on a plastic tube rack in a bucket of dry ice. They are attracted to a finger by static electricity, just as you described.
Water is made of polar molecules which can be aligned by an electric field. Water molecules in the air are attracted to the charged ends of the filaments of ice. The ends remains charged as the filaments grow. Separate filaments are kept apart from each other by the static charge, just like the hair of someone touching a Van de Graaff generator.