Shout Advanced Action Gel is a great product that I have been usually very successfully. My son is a baseball player and loves to slide, even when not neccesary! This advanced formula is a step above the normal Shout product. This bottle of Shout is very easy to use. I take those dirty baseball pants, sqeeze a small amount of this product on the stained area and use the attached scrubing brush to rub it in. The cap of this bottle has a rubber brush attached to the top, with a small hole for the gel to come out. I feel the brush really helps rub the gel in stains. I let the product sit on the clothes for a few minutes and then throw in the wash.
I have found that after following these few steps, I have been able to get out a great deal of stains that I was never able to get before.