I did something I hadn't expected to do, but feared would happen: I spilled something (soda!) on my beloved BJ Birkin. It looks hardly noticeable to everyone else, but I can see that it's kinda a "shiny" brownish color where the soda splashed on it. What should I do? Take it in for cleaning? If so, how long will I not have it and approximately how much would it cost? Thanks in advance.