K.K.
Hi K.,
You will be amazed if you add vinegar to the soap and water and wash it again. A farmer taught me that - their clothes can get really stinky - because they work their butts off all day and half the night! For his normal loads, he put the soap in and then added a cup of vinegar. It works AMAZINGLY well!
You might try it! It's just white vinegar, cheap-o stuff! If it doesn't help right away, try more or try soaking it with the soap and vinegar (after you let it agatate some).
Hope it works!
K.