A highlighter is a pen used to draw attention to sections of documents by marking them with a vivid, translucent colour. A typical highlighter is fluorescent yellow, coloured with pyranine. A marker pen, marking pen, felt-tip pen, flow or marker, is a pen which has its own ink-source, and usually a tip made of a porous, pressed fibers such as felt.
Try Isopropyl alcohol. Spray on leave few minutes. Wipe with dry clean rag.