I'm making a cloth doll and used a disappearing pen to lightly sketch her mouth before I painted it on. It didn't look right so I got the cold water and brush as usual and dabbed it off. So far, so good.
But as the fabric's dried, the ink has come back
And it's run up the thread of a seam line that I'd drawn over - it looks awful
I've used the pen many times before - it's occasionally left very faint marks on the palest of fabric, but it's never been this bad. It's a Prym 'Aqua-Trickmarker' and I used it on flesh-coloured stockinette with an iron-on interface at back.
Can anyone help? Is there any way of making it actually go away???