After 20 years commuting on old/cheap bikes, I finally evolved up to a nice solid touring rig with cable disc brakes (Avid BB5). I love the bike and the brakes. They're much easier to maintain, replace, and adjust than my old rim brakes were (as a result, they are more effective more often).
However, recently I have been getting a periodic pad-on-disc noise that I have had difficulty getting rid of. After the pads have been used a while and are say 1/2 worn, they seem to "stick" so that some part of a pad is touching the disc. This is especially true after a session of braking hard (usually at the bottom of a hill). Sometimes I can knock them loose by braking again or tapping the brake levers hard, other times, even that doesn't work. Today, I actually dismounted and tried to work the pads apart by hand because the noise was really bugging me and I was worried that the disc would overheat.
Are those little springs that go between the pads the problem? Can I make them stronger somehow?
I've tried taking the springs out and bending them out before reinserting them, but no joy there either (at least not yet).