I haven't had a problem with the glue since I haven't used it yet but I had a problem with spray starch on 2 different solid fabrics. They were 100 % cotton like all my others but it left big blotches like your glue did. It eventually washed out but it has to be something in the fabric itself I think. Even though we always use 100% cotton , we can't verify if it is all processed the same or the dye used in the fabric is all the same. I would try washing again but I don't think it is the glue. I think it is some sort of reaction with that particular fabric. Maybe the dye in it or something. Who knows but I know I had the same problem with the spray starch. Am I making any sense? lol