Jeff,
How about some pipe insulation on the rod? I don't know the dia. of the rod, so this may not work. I was thinking about a PVC pipe "t" with a down hall. Split the main part of the "t" so you can put it around the rod & tape it back together . Push it up the rod with the pipe insul. Put a little tape around the insul. Tie a down hall on the other part of the "t" so you can bring the insul down in the spring.
How about some pipe insulation on the rod? I don't know the dia. of the rod, so this may not work. I was thinking about a PVC pipe "t" with a down hall. Split the main part of the "t" so you can put it around the rod & tape it back together . Push it up the rod with the pipe insul. Put a little tape around the insul. Tie a down hall on the other part of the "t" so you can bring the insul down in the spring.