There are two clear strategies for solving the problem of keeping squirrels away from your feeders and birdhouses. You can prevent the (cute) pesky rodents from gaining access to your treasures, or you can give them a better, alternate place to dine.
Let's tackle the preventative strategy first. There are some very simple ways to keep your birdhouses and feeders safe from squirrel damage. And let me add here that it is imperative to keep your birdhouses safe from possible predation. You can build your own predator guard from my plans or you can purchase squirrel baffles, which come in a variety of styles, sizes, shapes and colors.
What you want to do is to keep squirrels away from your feeders and birdhouses right from the start. Squirrels are very persistent and once they find an easy source of food, they will try to overcome any obstacle you may put in their way.