Stain Pretreating Spray
Dampen the stained area of your jeans with cool water.
Squirt the stain pretreating product generously over the stain to cover it completely. Rub the denim lightly between your fingers to work at the stain. Let the pretreating product sit on the stain for about 10 minutes.
Hold the stained area under cool water and rub a little more to try to budge the stain. Keep working at the stain to rinse away the pretreating product and lift out the stain.
Toss the jeans into the washing machine. Set the wash cycle to normal and the water temperature to warm. Add standard laundry detergent and run the entire cycle.
Look carefully to see if the stain is truly gone from your jeans. If you can still see it, repeat the process.. If the stain seems to be gone, dry your jeans as usual.
Rinse the stain in the blue jeans with cool water to remove as much of the ink as possible. Keep going until no more ink rinses out of the jeans.
Stack three layers of paper towels and place them on a flat surface. Put your jeans on top of the paper towels with the erase marker stain facing up.
Saturate the cotton ball with isopropyl alcohol and start blotting at the stain. Keep going with the moist cotton ball to remove as much ink as you can. You'll probably see some ink transfer to the paper towel under the jeans and to the cotton ball. If these items get too full of ink, use new paper towels and cotton balls as you continue working at the stain. Keep going until you can't budge any more ink from the denim fibers.
Toss the jeans into the washing machine and wash them in the warmest water that's safe for the jeans. Add laundry detergent and color-safe bleach to the wash water.
Check out the stain when you take the jeans out of the washing machine. If you still see the ink, you might try repeating the steps one more time. Don't dry the jeans until you're sure you removed as much ink as possible.
Expo Markers recommends using Shout Gel to pretreat a dry erase stain.
Don’t machine-dry your jeans until you’re sure the stain is gone. The heat from the dryer can make the dry erase marker impossible to remove.