We get a lot of questions about squirrel-proof feeders. While some slow them down, these clever little guys often find a way to foil the best design. About the best we've found use a "hanging shield" and have a wire mesh perch that surrounds the feeder and is weight-sensitive to close the perch openings.
If you've found a solution, please tell us about it!
However, the National Wildlife Federation probably has a better solution called National Squirrel Appreciation Day, which is on January 21. We suggest you go to the following link and scroll down to number 3 and watch the You Tube Video. It's better than any picture or any information I could put up on this site on this subject!