I know this is an old post but this thread saved me sending the bike to the shop.
I read the information on the Seal Mate - watched the video and then made my own version using the side wall of a 4pint plastic milk carton.
Removed the dust seal and used my home made seal mate to clean out any contamination between the seal and the fork leg - and hey presto front fork leak cured.

Another great tip learned from the guys on this forum - thanks again R3owners members