Try a long soak in cool water, maybe with some LFN or Photoflo added, and be very, very gentle. Hopefully they will ease themselves apart with little difficulty, then hang them in a dust-free area. You might want to carefully wipe them down later with an antistatic product like FilmKleen for good measure, then store them in archival sleeves in an enclosed binder. They should be good to go for many more decades!
If someone has a better idea hopefully they'll weigh in here.
This forum has a lot of digital users but plenty of film lovers, as well. It IS where the soul of photography is, after all.
signed,
devoted film geek :mrgreen: