If the garment is colored, keep it away from sunlight while the lemon juice is sitting to keep the fabric from lightening.
For blueberry or other plant-based stains, enzyme cleaners with pectinase are the most effective.
If you’re handwashing your stained clothes, use a solution of equal parts water and oxygenated bleach. Wash with warm water if your clothes are white, or cold water if they’re colored. Remember to always check the tag for washing instructions. Oxygenated bleach is safer for colors than traditional chlorine bleach. Look for products with “Oxy” in the name—they might be labeled as stain removers instead of bleach.
Alternatively, use 1 tablespoon (15 mL) of dishwashing liquid and 3 cups (710 mL) of warm water. [12] X Research source
Alternatively, use 1 tablespoon (15 mL) of liquid dish soap and 2 cups (473 mL) of warm water. [17] X Research source
Be careful not to mix ammonia with bleach or any product that contains bleach, since this combination will make hazardous fumes. Keep children or pets away from this area of the carpet while you’re working with ammonia.