For cotton and polyester: Pre-treat stain with grease-fighting liquid dish soap, such as Dawn. Let sit for 10 minutes. Machine wash with one cup baking soda along with regular detergent. If stain persists, place garment stain side down on a towel. Apply a grease remover, such as Carbona Stain Devil, to the back of the stain. Grease will bleed through onto towel. Machine wash as usual.
For washable silk and wool: Apply a small amount of grease-fighting liquid dish soap, such as Dawn. Let sit for 10 minutes. Blot with damp towel to remove residue. Apply a grease-remover, such as Carbona Stain Devil, according to package instructions.