Removing stains from a dress shirt that has already been washed, dried, and ironed can be more challenging, but it's not impossible. The success of stain removal will depend on various factors, such as the type of stain, the fabric of the shirt, and how long the stain has been set. Here are some steps you can try:
Identify the stain: Determine the type of stain on the dress shirt. Different stains may require different treatment methods. Common stains include food, grease, ink, wine, and sweat.
Pre-treat the stain: Apply a stain remover or a mixture of laundry detergent and water directly to the stain. Gently rub the fabric together or use a soft brush to work the stain remover into the fabric. Allow it to sit for some time (at least 15-30 minutes) to penetrate the stain.
Rinse and blot: After pre-treating, rinse the stained area with cold water. Then, blot the stain with a clean cloth or paper towel to remove any loosened particles.
Repeat if necessary: If the stain is still visible, repeat the pre-treatment and rinsing process. For tough stains, you may need to repeat this step multiple times.
Try vinegar or lemon juice: For certain stains like sweat or yellowing, you can try applying a mixture of equal parts white vinegar (or lemon juice) and water to the affected area. Let it sit for a few minutes, then rinse and blot.
Baking soda paste: For food or beverage stains, you can make a paste with baking soda and water and apply it to the stain. Let it sit for 15-30 minutes, then rinse and blot.
Spot-cleaning: If the stain is localized to a small area, you can try spot-cleaning with a cotton swab dipped in a mixture of mild dish soap and water.
Professional cleaning: If the stain persists despite your efforts, consider taking the dress shirt to a professional cleaner. They have specialized tools and treatments to deal with stubborn stains.
Remember, it's crucial to avoid using hot water or the dryer until the stain is completely gone. Heat can set the stain, making it much harder or impossible to remove later. Always follow the care instructions on the shirt's label and test any stain removal method on a small, inconspicuous area first to ensure it doesn't cause damage or discoloration.