I have been using a blue Mark Be Gone pen and discovered that if you just put a light dot-dot-dot line instead of a continuous line it is much faster to remove. Sometimes you may need a solid line but make it with a very soft touch - in other words don't soak the fabric. Recently used it on a white-on-white fabric & had no problem removing although the heavier lines took a couple of tries - seemed to reappear in spots after the fabric dried.