Two questions please:
Let’s deal with your questions:
Want to proceed? I would do a quick liquid bleach soak (1/4 cup Clorox® Regular-Bleach₂ with CLOROMAX® in a gallon of cool water for 5 minutes (with “bad” stains maybe a little longer) then wash immediately in the hot water using detergent and 3/4 cup Clorox® Regular-Bleach₂ with CLOROMAX®. Always check for success before dryer drying in case not everything was removed with the original treatment; you may need to repeat the procedure.
Hope this helps; let me know how it turns out or if you have any further questions.