Belt stains on knickers

[SoGARef]

I have developed a concoction over the past 25 years that seems to work real well and has conquered any stain I can think of.

1 scoop of powdered laundry detergent
1 scoop of oxyclean (a new addition)
1 cup of white vinegar (used by pro cleaners for intensifying whites)
1 cup of Goop hand cleaner (the secret ingredient)

Put your uniform in the washer as soon as you get home. Allow to fill and begin to agitate. Turn off the washer and let soak over night. The next morning start the washer to complete the cycle. I am wearing Honig Elite knickers that are now 6 years old and they still look brand new.