I use a "Squirrel Buster Plus" and it works. They give up after awhile, and will just clean up what the birds drop on the ground.
Jim

They usually don't like safflower seed so you might try that

I also hear that it will work to mix hot cayenne powder with the birdseed. Birds don't mind the heat but squirrels do.

What can you do about squirrels tearing seat cushions and pulling out stuffing for nest building? I have seats that don't bother at all, then I have others seats that they are or have destroyed.

Please ignore my above post did not want to intrude on the OP's post. Posted my question in a separate post.