I'm sorry to hear that the stain remover caused grey stains on your white Nike tracksuit. This can happen if the stain remover contains bleach or other chemicals that react with the fabric or if it wasn't properly rinsed out during the wash. Here's what you can do to try to remove the grey stains:
Stop using the garment: Before attempting any stain removal, stop using the garment and avoid putting it in the dryer. Heat from the dryer can set the stains, making them harder to remove.
Rinse with cold water: Rinse the affected areas with cold water to remove any remaining stain remover residue. Blot the stains gently, taking care not to rub them, as rubbing could spread the stains.
Soak in white vinegar: Fill a basin or sink with cold water and add one cup of white vinegar. Submerge the stained areas in the solution and let it soak for about 30 minutes to an hour. White vinegar can help neutralize the bleach or chemical residues and may help remove the grey stains.
Wash again: After soaking, wash the tracksuit again in cold water using a mild detergent. Avoid using bleach or any harsh chemicals during this wash.
Inspect the stains: After washing, check the stains to see if they've lightened. If they are still present, you may need to repeat the vinegar soak and washing process.
Try a commercial color remover: If the vinegar soak doesn't work, you can try using a commercial color remover specifically designed for white fabrics. Follow the instructions on the product carefully, as some color removers may contain bleach or other chemicals.
Consider professional cleaning: If the stains persist after trying these methods, it's best to take the tracksuit to a professional cleaner who can assess the fabric and use specialized techniques to remove the stains without causing further damage.
It's essential to be cautious when using stain removers on colored or delicate fabrics. Always test the stain remover on a small, inconspicuous area of the fabric before applying it to the stain directly. This way, you can check for any adverse reactions before treating the entire garment.
In the future, when dealing with stains, it's a good idea to carefully follow the instructions on the stain remover packaging and consider using a color-safe or fabric-specific stain remover to minimize the risk of discoloration or damage to your clothes.