Removing grass stains from jeans that have already set in after a wash can be more challenging but not impossible. Here are some steps you can follow to try and tackle the grass stains:
Pre-treat the Stains: Before washing the jeans again, pre-treat the grass stains. You can use a stain remover or a mixture of equal parts white vinegar and water. Apply the solution directly to the stains and let it sit for about 10-15 minutes.
Scrub Gently: After the pre-treatment, use a soft-bristled brush or an old toothbrush to gently scrub the stained areas. Be careful not to be too aggressive, as you don't want to damage the fabric further.
Soak in Vinegar: Create a mixture of one part white vinegar and three parts water in a bucket or basin. Soak the jeans in this solution for about 30 minutes to help break down the grass stains.
Wash with Enzyme-based Detergent: Wash the jeans separately from other clothes, using a laundry detergent that contains enzymes. Enzyme-based detergents are effective at breaking down organic stains like grass.
Check Before Drying: After the wash cycle, check the jeans for any remaining stains before drying them. If any stains persist, avoid putting them in the dryer as the heat can set the stain further. Instead, repeat the pre-treatment and washing steps until the stains are gone.
Sunlight: If the jeans are still stained after multiple attempts, you can try placing them in direct sunlight. Sunlight can sometimes help to naturally bleach out stains. Just be mindful of extended sun exposure as it can also fade the color of the denim.
Always check the care label of your jeans before attempting any stain removal techniques to ensure you are using the appropriate cleaning methods for the fabric. Additionally, it's a good idea to test any cleaning solutions on an inconspicuous area of the jeans first to make sure they don't cause any damage or discoloration.