You can remove marker stains by rinsing the stains with cold water until the water runs clear. Place the fabric on paper towel, and saturate the stains with rubbing alcohol, using a cotton ball as a blotter. Change paper towels as necessary, and it absorbs the color. Wash the garment in as hot of water as possible for the fabric, and add a bleach (colorsafe for colored fabrics) and rinse in warm water.