OK, What i do is every time i bleed my brake i will put water in them. But the next time i whack some oil in there so that it lubes up all the parts. the brake feels crappy but oh well lol .
Hope i helped.
P.s if u don't want to do that then just whack some gt-85 in there then flush it out a bit later that way there will be lube in there.
Scott.