How to keep a squirrel from eating the seed that’s meant for the birds? Vaseline! If you do this, make sure you have a camera ready, like Robert Krampf did.
For anyone who is concerned about the squirrel, he still raids our other two feeders and the vegetable garden. The tiny amount of Vaseline used is non-toxic, the kind used for lip balm. He quickly learned that this feeder was not worth the trouble, so we have not put more on the pole, and the birds are delighted to actually get some of the bird seed.(via Tastefully Offensive)