Cleaning Seat Belts

["BILLINGS,MIKE (HP-Boise,ex1)" <mike_billings@hp.com>]

I just rebuilt the engine on my Solo Vee, had a stuck pressure control
valve, lost a gasket in the oil filter and sprayed (at least) two quarts of
oil all over the car, myself, and my helping wife (oh boy).

I owe my wife some new clothes, that's first.  But, the seat belts in the
Vee got covered in oil.  I need some good ideas on how to clean them.

Ideas?

Mike