Tanning Oil Stain on Clothing?

If the dress is washable, I would put some Dawn dish washing detergent on the area, leave it alone for a day or two and then wash. Dollar Store shampoo for oily hair works great also, Suave or the cheapest shampoo they have! I got some pizza sauce on a top and put Dawn on it and it came right out. I also use Dawn for collar stains, underarm stains, grass stains on baseball uniforms and just about every kind of stain on clothes! Works like a charm every time!