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Soak a hand towel in fabric softener. Squeeze out any remaining drops from the towel. Hang it over a chair (or outside on a clothes line) to dry. My house smelled super clean for the three days while this towel was drying completely. Yes, it took three days! You must make sure it dries completely! After the towel dries you just throw it in your dryer along with clothes and use it as a dryer sheet for 40-50 loads before soaking again.
How to Remove Crayon From Clothes Already Dried in a Dryer | eHow
How to clean crayons from clothes after washing. 1) boil water and add Oxy Clean and add clothes. 2) grab a hand scrubber and some HAND degreaser, the one that worker use with linoleum. 3) add a little to the scrubber and scrub the areas with crayon until it clears. 4) rinse clothes and wash through with a regular cycle in hot, just to get any remains out. Add a scope of Oxy. This should get everything out! Worked on our khakis!