Since the zipper has a rubber seal I put a good bit of zipper lube on the main zipper before I started using the jacket. I've had my FL puffy for near 2 years now and its been doing fine. Try some Mcnett or Aquaseal brand zipper lube, it comes like a a tube of chapstick and really helps with zipper break in and care on any zippers.
FL is really good about customer care and warranty.
FL is really good about customer care and warranty.