I use FriXion pens. I first learned about them from a video on Missouri Star Quilt Company but you can get them at Staples also. You use the pen and then iron the marks after you've sewn. Try it on scraps first. I'm really sorry you're going through what you are for your current problem, and I can't help you there, but I'm sure others on the board will come up with some answers. How exasperating after all the work you put into it.