Here's my sitution. I have a set of Avid Elixir R brakes on my Stumpjumper. Mid way though last year the rear brake started losing power. Took it to a local shop to have them bleed the brakes as ive never done that before. They were fine for maybe 3 weeks then went back to no power. Now after winter I changed out my rear tire and now my rear caliper is hanging up badly and the loss of power is still there. Front brake works perfectly however. Attempt to keep bleeding till it gets back to normal? I work full time and am in school so I dont have all the time in the world to keep dicking aroung with this as I would try to bleed myself this time around. Any other options?