I've had great luck with the washable markers. Even though you prewashed the green fabric...that could be the culprit. I prewashed and dried a red Kim Diehl fabric as well as a Hoffman red fabric. The Hoffman bled when I applied steam. The other when I washed the quilt (with color catcher) the first time. I haven't rewashed the red quilt, but plan on using orvus and color catchers the second time around.