What with all the rain and mud/leaf puree around at the moment I am having one of those seasonal problems. My back brake is clogging up and squeaking. The brake still works and stops when I need it to but it doesn't fully move back to position. The right hand pad stays just in contact with the rim and makes a squeaking, skirling sound as I move.
This doesn't stop me moving forward or even using the brake properly but I can feel the drag. It might only be 2/3% of effort but it is annoying, as is the noise. I can easily flick out the offending pad at the start of a ride or at lights but as soon as I use the back brake it starts again.
I have to admit I generally use the front brake to feather and control speed rather than for stopping power. I guess this just feels natural as I am right handed and the back brake is for rapid stopping, i.e. double hand braking.
I clean the mud off regularly and have tried picking out dried mud with a needle and even flossing the brake but the problem comes back the next time it rains. I am a bit worried about taking components apart to clean them and loosing the reasonable functionality I have now. Does anyone have any non-invasive tips to keep back brakes moving smoothly?