I tried cleaning a leaky fork seal last night, but I had no luck. First of all, I couldn't get a business card down inside the seal without it bending and then ripping. So, I switched to a thin piece of plastic I cut from a blister pack package to roughly the same shape as the "seal mate". Still no way to get that plastic down between the seal and the fork tube.
I replaced the stock fork seals with "LeakProof" brand fork seals several years ago, so perhaps there is some difference in this brand? They seem to be VERY tight against the fork tubes. Maybe tighter than stock? Also, I'm thinking that maybe this task needs to be done when it is 90 degrees outside and the seals are very soft and pliable.
In any event, I pulled the circlip, and the metal washer that covers the seal, and cleaned up all of the gunk that was in there, and I thoroughly cleaned out the surface of the seal, which was very cruddy, and I'm hoping that this is enough to see an improvement.