Maybe it's time to give Coke a place in your laundry room. The soda makes an effective presoak treatment and stain remover for grease spots in your laundry. For best results, apply to fresh stains. If the spot discolors slightly when you pour on the Coke, that’s a sign it is working. Let the liquid sit for a few minutes, then launder as usual in the warmest water recommended for the garment.