The length of time it takes for an oil stain to become permanent depends on several factors, including the type of fabric, the type of oil, and how the stained garment was treated after the stain occurred. Generally, the longer an oil stain remains untreated, the more challenging it becomes to completely remove it. The oil can penetrate deeper into the fabric fibers and set, making it harder to lift the stain.
Older oil stains that have already set for a long time can be more difficult to remove, but it's not impossible. Here are some steps you can take to try and remove very old oil stains and restore otherwise good clothing:
Pre-treatment: If the stain is fresh, you should always try to blot it with a clean cloth or paper towel to absorb as much of the oil as possible before it sets. However, since we're dealing with older stains, you can skip this step.
Identify the Fabric: Different fabrics react differently to various stain removal techniques. Check the garment's care label to identify the fabric type and follow any specific cleaning instructions.
Spot Test: Before attempting to remove the stain, perform a spot test on a hidden area of the fabric to ensure the stain removal method won't cause discoloration or damage.
Apply Dish Soap: For older oil stains, one effective method is to apply a small amount of dish soap directly to the stain. Gently rub the soap into the stain, working from the outside edges toward the center. Let it sit for about 15-30 minutes.
Wash the Garment: After pre-treating with dish soap, wash the garment as per its care instructions. Use the warmest water temperature recommended for the fabric. Check the stain before drying; if it's still visible, do not dry the garment, as heat can set the stain further.
Use Stain Removers: There are various commercial stain removers available that are designed to target oil stains. Follow the instructions on the product and treat the stain accordingly.
Try DIY Remedies: You can also try using household items like baking soda, cornstarch, or talcum powder to absorb oil from the fabric. Apply the chosen substance to the stain, let it sit for a few hours or overnight, then brush or shake off the powder before washing.
Consider Professional Cleaning: If the oil stain persists despite your efforts, consider taking the garment to a professional cleaner. They have access to specialized stain removal techniques and equipment that may be more effective on old, stubborn stains.
It's important to note that there's no guarantee that very old oil stains will come out completely, but these steps increase your chances of success. The key is to act as soon as you notice the stain and try multiple methods if needed.