Depending on how bad it is, try using facial cleaning pads, like biore or oxy or something like that. I had my leather jacket in storage for a year and when I got it out it had a wierd smell to it and it felt kindof sticky. I used one of those biore pads on it and once it dried again the smell was gone and the stickyness was gone too. I don't know if it would work on shampoo, but it's worth a shot. If it dosn't you can always clean your face.
