Remove the ink killer writer stains

Ink stains from the blue side of an ink killer can often be removed with the Sterillium® hand sanitizer. (The fresher the stain, the better)

What you need to do is soak the stain liberally with Sterillium®, then gently rub the stain out with an absorbent cloth. Always before the material on the stain is but check for color fastness.

Sterillium® also removes ink from CD writers, pens, permanent writers, fiber pens and other inks.

PS: Fountain pen ink can not be removed because it's built differently.

How to Remove Ink Stains From Leather | July 2020