Blot excess oil with a paper towel or clean cloth
Sprinkle baking soda, cornstarch, or baby powder on the stain
Let it sit for 15 to 30 minutes
Brush off the powder
Apply a small amount of dish soap directly to the stain
Gently rub the fabric together or use a soft brush
Let it sit for 5 to 10 minutes
Rinse with warm water
Wash the shirt in the hottest water safe for the fabric
Check the stain before drying
Repeat the process if the stain remains
Air-dry until the stain is completely gone
Avoid putting the shirt in the dryer until the stain is removed