leave it alone.... no one in the real world changes brake fluid any way
thats just one of those added extra things...

do the other 3 and leave it alone... or better yet leave the other 3 alone
as well... use a large c clamp when you do the brake jobs... and just leave them be.....


Now.... if you must change the fluid go to the dollar store and buy a turkey baster.... open the fluild resvoir and suck out till your hearts desire and refill with clean fluid.... do this ...once a week for a month or two and you will have completely changed the fluid without messing with your system.