I'm running nashar bulhorns, nashbar bar-end levers, and an old shimano 600 single pivot road brake as a front brake on my fixed gear. It won't spring back on its own anymore. The cable isn't that old. Ideally I would just buy a new dual pivot brake but this isn't an option at the moment. Part of the problem may be that the brake was designed for old style road brakes and that routing the cable along the inside of the bullhorn just produces too much friction. Maybe there is a better way of routing the cable. I have noticed that the brake stiffens up after it rains and some chain lube makes things better for a while. My question is this: Can I clean and rebuild this brake? What are the options I should try to get this brake to work properly? Thanks.