For general purpose spotting problems, we recommend Simple Green concentrated formula.  The proper dilution rate is 30 parts of water to one part of Simple Green.  This product is non-toxic and biodegradable.  Also, it can be purchased from Sam's Club for around $8/gallon.  Hardware stores also sell Simple Green as well.

The proper procedure is to spray or pour a limited amount of diluted Simple Green on the spot.  You can work it into the spot with a spoon or a soft nylon brush.  Every spotter should be rinsed out of the fiber.  All spotters become sticky and attract soil

Rinsing can be accomplished with a Little Green Machine, which costs between $80 and $100.  You can also use a spray bottle of water and a Wet Vac to remove the detergent.