I just went to use my flip mat for the first time today. It says I can use any kind of marker, but after drawing with my Sharpies, it won't come off! I've scrubbed with paper towels and washcloths both dry and wet and nothing goes away! The markers are the retractable permanent sharpies, but I also tried another permanent marker and it won't come off either!!
What's wrong with my mat? Did I get a fluke, because all the other reviews say theirs wipes off. Help, I really want to use this mat!