Method 1. Add a small amount of ammonia and borax to the warm washing powder solution, and then scrub the fabric to remove it.

Method 2. You can scrub with ammonia water first, then scrub with a small amount of oxalic acid solution and then rinse with water.

Method 3. Rubbing with fresh lotus root juice can eliminate soy sauce stains. Put a little sugar on the soy sauce stains and wash with warm water.

Method 4. After wetting it with water, soak it with warm glycerin for half an hour, and then wash it with soap after scrubbing.
After scraping off the stain, wash it off with a warm detergent solution.