I look in on all of my fluids from time to time, I suck out the dark contaminated fluid from the resivoirs and refill them. I have noticed in the past and again today, that on the cap to the clutch, there is a small amount of grease, or a jelly like substance (NOT GRAPE) don't ask!!! how I know. I use prestone brake fluid in both units, brake and clutch masters, and I replace them at the same time. any suggestions will be helpful, and yes I have had the clutch/hyd slave replaced in the past year. thanks!!!