If you get dye on the back of the disc, is there any way to get it off? I got a big blob of dye on the back of a champion teebird dye last night, and while it's very faint, you can see it through the disc. I rinsed it off right away, but it was too late. I thought I read about someone using acetone to remove it...has anyone tried that? I don't have any experience with acetone, I just use magic erasers to get the stamps off (which works awesome, by the way, red stamp came off a light yellow disc with no trace of color smearing).