"Weeping fork seal? Pry back the dust cover, and insert a strip of 35mm film between the male fork tube and the fork seal. Work around the whole seal with a "sawing" motion. The sprocket holes in the film trap grit that might be causing your leak. Takes 2 minutes, and is way easier than a fork seal replacement."
Found this on Bike Bandit facebook page. There was a talk about "who the heck still use 35mm film", though...