EMS, Wellington.

Through six children I cleaned many sweat-tops and most clothing of oil, food or grease stains by hand-washing (scrubbing the old fashioned way before there were washing machines) with a cake of sunlight soap and moderately hot water before putting them through a normal wash. Alternatively you can just soak them in a bucket of hottish water with a double dose of your normal washing powder prior to washing or do a hot wash! – as long as you know the material or garment can tolerate it and most can despite what the labels say. (Don’t go overboard and use boiling water!)