I also just leave the wooden eggs. I find it encourages them to continue laying where they find what they believe to be eggs. It might also have another affect of having a hen turn broody, but I don't mind that either, from time to time, as I am terrible with the incubator. In addition, I happen to be from a very warm climate and we have a lot of snakes. If a snake happens to get into my coop and swallows a wooden egg (which they do), I promise you he might have gotten in, but he won't be able to get out. The egg will not fit through the chicken wire. That means one dead snake and a lot of saved eggs and chicks.
btw.....I am a certified penny pincher and am first to admit it. I was too cheap to purchase golf balls or wooden eggs from a poultry supply place. I googled wooden eggs and found some at a craft supply outlet online and bought two 25ct bags for less than I would have for a dozen "wooden eggs." We put a protective finish on them and I dropped 3 eggs in each of my 6 nesting boxes and have most of them inside, waiting to be needed for something.