Spaghetti Sauce Run fabric, inside out, under cold water to flush out as much of the sauce as possible. Apply liquid laundry detergent to stained area and allow it to soak in cold water for 15-30 minutes. Rinse. Sponge stained area with white vinegar and rinse again. Lastly, treat stain with a prewash stain removal product and launder on hottest setting the fabric will allow.