How do I clean the surface of the grid of Permanent Marker Ink?
The surface is very durable. We tested Cutex Quick & Gentle Fingernail Polish Remover (containing Acetone) to successfully (gently!) remove permanent marker ink. Other possible remedies (that we didn’t test yet) include: Aqua Net Hair Spray, Isopropyl Alcohol, and WD-40! But do not misuse these products. If they remove permanent Marker ink, they can degrade your skin/body.