I marked my quilting lines with some orange fabric chalk and now the orange won't come out. Does anyone have any ideas? I soaked it, and washed it, and washed it again in Oxyclean (it works on diaper accidents perfectly, so I thought it was worth a try). I just bought a Frixion pen, so this won't happen again. However, if someone knows how I could get the orange chalk out, I would really appreciate it.