How many times have you finished the laundry only to find a good shirt with a grease stain on it? Okay, maybe you never have. I have several times. I would just wash it a few more times and then throw it away when the stain wouldn't budge. Even Spot Shot wouldn't help. I've lost more shirts that way. But I saw something on tv a few weeks ago. The "Queen of Clean" said that oil gets out oil. She suggested putting WD-40 on the grease stain. Then you cover all that with dishwashing detergent and then wash it like usual. It was a little scary at first spraying a shirt with WD-40. But it worked. I've done it successfully about a dozen times in the past few weeks. It's worked everytime.