I had the same problem as many of you, that is removing the blue Clover chico marker, and finally found the solution. I sprayed the marks with Shout, let them soak in that for a couple of hours, and then sponged them with a mild soap and cool (not hot) water. I was so grateful for the excellent results, as I had never spent so much time on a quilt in all of my 20 years of quilting, and was just sick when it looked like it might be ruined.