hi everyone,
i soaked my blocks in vinegar and baking soda overnite. the stain is very stubborn and doesn't want to come out. between the oxyclean and vinegar mixture, my blocks has shrunk by a 1/2 in. so the 5 remainder block may not be completed and another ufo will set until i can decide whether or not to ever complete it. i thank everyone for their suggestions and support.
tea
"now devastated and an trying to move on to a new project. "