OK Im changing my rotors, calipers and hoses on the front of my 91 rs, and I've come across something strange. When I took the cap off my master cylinder it looks like there is lint mixed in the fluid. I just bleed the whole system down a month ago so im wonder what has caused this. A little help on this one it weird.

 

Well I talked to a friend who owns a shop he said it sounds like mold. I'm gonna take it to him in a few days to look at. Maybe have him power bleed the whole system.