To remove blueberry stains from white clothes:
1. Blot up excess blueberry with a clean cloth.
2. Pre-treat the stain with hydrogen peroxide or lemon juice.
3. Soak the garment in a solution of cold water and white vinegar for 30 minutes.
4. Machine wash the garment in cold water with a detergent containing enzymes.
5. If the stain persists, apply baking soda paste and let it sit for several hours before washing again.