[RickM]

Dealerships have used "Brake Kleen" for many years to clean grease from interiors. The spray dissolves grease almost instantly. Spray and blot. Repeat if necessary. You want the spray to do the work as much as possible (not the cleaning cloth). Do your best not to rub the grease into the fabric. I've used many times with success.

As always try a bit in an inconspicuous area to insure compatibility. Good luck.