I use Goo Gone spray gel to get rid of labels, glue and sometimes oily substances.
It just takes a little to spray the oil spot. Work it in a little and let set for 5-10 minutes before laundering.
This will work gooey, sticky and greasy problems. I get it at Walmart for around $4.00. This bottle has lasted me for over a year.
This will work on candle wax, gum, cleaning grills, crayon, and more.