I've tried everything...including...
Pepper powder which supposedly the birds don't mind but the squirrels do... didn't work.. squirrels love it too.
BB guns (just wanted to scare them away, not kill them), didn't stop them
So I broke down and spent $50 for the 'spinner'!
Unfortunately I couldn't think of any better background music.
Did it work? Well, you'll have to watch it to the end to find out.