I would try washing the top in warm water. Because it's for a child, you really want to get all the excess dyes out. I'm unfamiliar with Retayne, but I use color catchers regularly. You may have to rinse it a couple of times but hopefully it will rinse out. I also occasionally put a little Oxyclean or another non-chlorine bleach for colors in the wash and it helps get out the excess dyes. It's a cute quilt! Hope