Protective plastic peeling doorbell 3 plus

I have a doorbell plus (3) and when changing the battery last time, noticed a plastic protective film starting to lift and peel. Initially thought maybe I’d forgotten to take an film off when first installing the doorbell, but that was three years ago, and this film is most definitely stuck on! Where is has partially come off, on that side the camera is now hazy… some googling tells me that many people have had this issue in the states and that it means a replacement unit?? Surely not?