What actually forces the V-brake to spring back? Is it just the cable pushing it back? Because mines' sticking. The bike is pretty old, but hasn't seen much use. I tried lubricating the cable, I pull everything pretty tight, but when I release the brake, the brake handle just stays down. If I push the handle back up, the brake moves a little, or the cable bunches. This is the rear brake. Also the whole brake assembly is crooked, if I leave it too loose the brake doesn't close properly, if I pull it tighter, the whole assembly skews towards the left.