I'm mostly posting this so that, when it happens again, I remember how to clean it when my child misses her paper and draws all over my microsuede chair with a blue pen! The chair that we cleaned is a dark-sage color, so I'm not sure if this would work alright with light-colored microsuede (we also have an off-white microsuede couch - from experience, sometimes water marks show on that couch, but not on the dark-colored chair). You'd have to do a patch test to be sure. Happy cleaning!
1.) Remove the pen from the offender's hand. This is important.
2.) Make a paste out of baking soda and water. Using a damp cloth, saturate the pen marks with the paste. Let sit for at least an hour.
3.) Rinse the cloth with hot water and wipe off the baking soda paste. By now, your ink marks should be greatly diminished, but not yet gone.
4.) Take a toothbrush (not a used one, please,) and squirt some Dawn dish detergent on it. Gently scrub the ink marks with the toothbrush until they are gone.
*My husband actually suggested the Dawn - I didn't think it would work, but, alas, it did. I was very surprised, but pleased all the same :)