I love the Frixion pens and highlighters. I always wash my quilts after they're finished and none of them have left even a trace. I put my samples in the freezer and that didn't bring back any hint of the markings, either.
I didn't have the same luck with the Crayola washable markers - even scrubbing the samples hard in between my thumbs in warm water with detergent and Clorox II didn't take all the color out.
I figure that the markings have to come out under the same conditions which I wash my quilts, and like KyKat, I don't ever wash my quilts in hot water, either. I'll stick with the Frixion and the SewLine ceramic pencils.
