How do you pre-shrink batting
I'm pretty new to quilting and I'm always reading that you should preshrink batting before using it, but I don't know how. Do you just toss it in the washing machine? Doesn't that bunch it up? If you do, what water temp? I can't imagine hand washing queen-size batting -- seems too big to handle. Or is there a secret to it?
Sorry for the stupid questions, but I'm confused.