Stain Removal

i have tried a lot of things for stains. there are some which are too difficult to deal with. i use zonrox, chlorine granules, oxalic acid, vinegar, lemon juice, including the monosodium glutamate or vetsin, ajinomoto. just try one after the other and if the stain refuse to budge, add more powder soap to the stain plus the thing you are using to remove the stain. take extra care when using oxalic acid, it can damage the cloth if you place too much in a single application.