Rinse well with hot water and launder. May 17 2018 Ginger Whitson No Comments. How To Remove Stains Like Mustard Red Wine And Chewing Gum Stain Remover Stain Remover Carpet Remove Mustard Stains How to REALLY get mustard out of your clothes. How to get mustard stains out of jeans . No matter what kind of stain it is make sure the stain is out before you put your clothing item in the dryer. Do not use warm or hot water. Apply a stream of cold water to the back of the stain to rinse it away. Warm water sets stains so make sure it is cold. Scrape off the dried up or fresh mustard from the jeans. Wash in cold water and if stain remains then soak again overnight with the enzyme solution and rewash. How to Get the 8 Worst Stains out of Clothes. Mix 1 tablespoon of dishwashing detergent in 2 cups of warm water. How to REALLY get mustard out of your clothes. Thoroughly blot the stain. Apply a liquid laundry detergent directly to the mustard stain. Apply the solut...