How to Clean Up Crayons on The Wall

I saw a woman on TV. who used WD-40 and then cleaned it up with soap and water. So I figured I'd try - it was that or sand down the whole room and paint. I was AMAZED!! The crayon came off with minimal elbow grease!!!! and I mean there was A LOT of crayon on the wall - ALL GONE!

My problem afterwards was the greasiness from the WD-40. Although the woman had suggested soap and water, I used a spray grease cutter and that worked well. Dishwasher detergent may also work, anything that is a grease cutter.