Stain removal is all about speed and technique. Here's the proven method for tackling grease stains effectively.
If the stain is fresh, blot up excess grease with a paper towel. Do not rub -- rubbing pushes grease deeper into the fabric.
Sprinkle baking soda or cornstarch on the stain to absorb the oil. Let sit for 15-30 minutes, then brush off.
Apply a small amount of dish soap directly to the stain. Dish soap is formulated to break down grease.
Scrub the stain gently with an old toothbrush. Work the soap into the fabric.
Wash the garment in the hottest water safe for the fabric. Check before drying -- heat sets stains. Repeat if needed.