I just bumped into the inside door of my woodstove while helping my husband- I got a spot of soot on the shoulder of my Theory Juliet-Cashcotton sweater. How do I clean it? I am about to cry- I searched the internet for a month because this sweater was sold out and stupidly should not have been helping with a household chore while wearing it. Do I soak it? Stain-stick it? Drop it at the dry cleaners tomorrow? Help!