I wouldn't recomend Simple Green or pressure washing. I detail professionally and pressure washing is a big no no. Simple Green can be okay if it's diluted but I still wouldn't recomend it. Go with a natural degreaser like Poorboy's World
http://secure.detailedimage.com/Merc...gory_Code=PB00 and a Cleaner for vinyl rubber etc like 303 Aerospace Cleaner
http://secure.detailedimage.com/Merc...gory_Code=3000.