Everyone knows that keeping squirrels out of bird feeders is nearly impossible. Here are a few clever inventions that really do help keep the squirrels away.
Add a metal stovepipe to fit around a feeder pole, squirrels cannot figure out how to climb it.
A 2-liter plastic bottle with the neck cut off can be slipped onto a pole below the feeder making the feeder squirrel proof.
Crisco oil or motor grease can be used to coat feeder poles. It may be messy but the squirrels cannot climb up the pole.