It's probably a combination of being a young guy and having an active lifestyle. . . but every time I wash my clothes I find new stains that need to be removed. Simply washing them with detergent often isn't good enough to remove them completely, but using this spray in conjunction with the normal washing seems to do the trick. How effective it is definitely depends on how long you pre-treat it for, the type of stain you have and how much of the product you use. Even if I manage to avoid staining my clothes with the food I've eaten, kept them from getting any grass/dirt stains my shirts always have a ring around the collar. A quick spray with this before throwing it in the wash seems to do a great job at helping it out and making sure that my clothes look good the next time that I wear them.