Don't let one bad experience discourage you. Probably you see by now that using a pattern as it is presented by the designer is one thing and changing it is quite another. As for getting the layers apart after using Elmer's school glue I would soak those areas in a shallow pan of water and gently loosen them and re-glue them. I would be afraid that putting it in a commercial size washer would destroy the integrity of all the layers-especially the batting. Relegating it to the UFO pile only postpones doing what needs to be done.