With several children and garden work there are always stains to be treated. This stuff works as a pre-treat to washing.This costs less than most commercial products and works well in cold water. Experiment a bit With the time you have to let it set..

Cream of Tarter, salt, add lemon juice till you get a paste.

This is a great pre-treat for bad stains.

There is another trick for blood stains. Use 1/2 hydrogen peroxide in water and let the stain set for a bout 30 minutes before washing. Keep after the stain until the mix quits bubbling then wash in cold water.