Dealing with stains?
Most stains can easily be removed with hydrogen peroxide! This includes blood and underarm stains as well. Leave on for about 10 minutes, scrub and wash as normal.
For human oil marks on collared shirts, using a normal shampoo works great!
For grease, cooking oil and butter stains, there are two methods that work well--one being Blue Dawn dish soap and the other is baking soda. With the baking soda, sprinkle over stain..you will begin to see it 'ball' as it absorbs the grease. Repeat as necessary until no more 'balling' occurs. Wash as normal. THIS EVEN WORKS AFTER YOUR GARMENTS HAVE BEEN WASHED AND DRIED!