Okay, here is my newb moment. I set out today to make a quilted quilters apron. I quilted it, pieced pieces together, started sewing....everything was going great. I got to the very last bit of sewing the sections and then bam! there was a spot on the fabric. I am guessing it was the oiling I gave my machine this morning, the goop inside looks suspect. Does anyone know how to get this stuff out? I didn't want to wash it before asking someone. I will most likely put something over the top of it, but still want to know in case it happens in the future. The fabrics are a really durable denim type fabric.