How do you bath a bird?

I have two budgies that hate bathing! I was told that the best way to do it was to fill a container in which they fit comfortable about 1/3 with water and let them just splash around in it - this would have been good advice if my birds had any interest in bathing. Since they don't know, I bought a spray. It's supposed to be used in lie of a bath and it's supposed to help with their feathers. I don't think it's necessary for a bird to bathe, but it's still a good thing