Blot dry-cleaning solvent directly on the crayon stain to remove the color of the stain. Use as much dry-cleaning solution and as many cloths as needed to remove the color residue.
Mix 2 drops liquid dish soap with 1 cup lukewarm water until the solution is sudsy.
Blot the soapy solution directly on the stain to remove the grease residue. Continue blotting until the carpet no longer feels greasy.
Soak a cloth in clear water and press it over the carpet to rinse out the cleaning solution residue.
Press a dry cloth over the wet area to soak up the water.
Repeat the rinsing and drying process until the carpet feels smooth and clean and is just slightly damp. Let it air-dry completely.