I need advice on what to do about the headliner in my '79 wagon. I foolishly tried to clean it by gently wiping with a cloth dampened with a weak solution of water and Murphy's Oil Soap. It cleaned up nicely, but now the stitching where the "ribs" are is coming apart! Is there any way to fix it without a total re-do? I really don't want to have to replace it as it has no tears or holes.