The Crayola Ultra Clean Washable Markers are my go to in just about every situation. They are inexpensive, I've never found a color that doesn't readily wash out with any temp water. Not a problem for me as I always wash my quilts when they're done. Besides getting out the marks, it seems to "settle" all the stitching, batting, etc. and the quilt looks lovely and I can gift it knowing there won't be any surprises when it's washed.
P.S. I understand old eyes. I'll be 80 in just a couple weeks.