Last weekend I found out the pistons on my avids were sticking, so I pulled them apart, cleaned and lubed every thing but decide to replace the lot and got a couple of service kits, when I stuck them all back together I replaced the fluid and bled the system so I could use this bike..... Which I haven't due to being on call this week, do you think I could just suck the fresh unused in anger fluid and stick it back in after I replace the pistons and seals? Or should I just junk if and renew it?