After buying one of the larger packages of washable Crayola markers, I tested them all on scrap muslin. All the colors came out after a soaking in the water. Dabbing at them with a wet paper towel an cloth does not work too well; some of the colors ended migrating to other areas. Be sure to read the instructions...some packages say to wash with HOT water. I use the one that says to use with either cold or hot water.