Graphite the cable you can take it off and re adjust the whole shebang from scratch...
Beware fraying any thing. Put your adjusters all the way in pull the handle and either work the adjuster off of it is slit if n.a. pop out the brake nub thing in the handle. Cellophane tape the end and trim the edge
to cut take tape off before retheading it....
Or remove brake hub armature readjust adjusters half way before tightening.