Things You'll Need
Clean white cloths
Grease stains can seem like a permanent problem when they've latched on to your jeans. But if you avoid setting the stain, and use the right cleaners, it doesn't have to be. Repeated regular washing without pre-treating the stain can cause a permanent problem. High heat like that from your clothing dry could set the grease in. To remove stubborn grease stains from your jeans, treat it as soon as you soil the clothing. However, if the stain is older not all hope is lost.
Apply the solvent cleaner (ref 1) to your clean white cloth, soaking an area the relative size of your stain. Use the cloth to blot the stain on your jeans. If this does not remove the grease proceed to steps two and three.
Mix three to five drops of detergent per 1/2 cup of water. Dip the denim in the mixture, or use another cloth dipped in the mixture to apply it to the stain.
Dip a portion of another clean white cloth in alcohol. Apply the portion of cloth to the stain. Let your pre-treatment stand for an hour or two. Wash your denim in a regular wash cycle. If the stain remains, let the jeans dry naturally and repeat steps.