[header] How to clean nicotine stains [title] Spray the stain with a gentle degreaser. [step] In order to fight off the gummy, sticky stains, you'll need something that cuts grease. You can use store-bought products like goo-gone, dr. bronner's, or simple green, or you can make your own. 
[substeps] For strong stains, use 1 cup vinegar mixed with 4 cups water. Let the vinegar solution sit on the stain for a few minutes before wiping.