Blot the stain immediately with a clean cloth or paper towel
Rinse the back of the stain with cold water
Apply liquid laundry detergent directly to the stain
Gently rub the fabric together or use a soft brush
Let it sit for 5 to 10 minutes
Rinse again with cold water
For tough stains, apply a paste of baking soda and water
For grease stains, use dish soap before washing
Wash the shirt in the hottest water safe for the fabric
Check that the stain is gone before drying
Repeat the treatment if needed
Avoid using heat until the stain is fully removed