when i first got the car there were black marks almost everywhere ont he white leather and plastics. as if the last owner decided to put his/her feet everywhere.

i used upholstry cleaner first foamed everything from plastics to leather and that did a decent job spruced it up nicley i went everywhere, then i went to a JML Magic Eraser.
By god it did amazing. it removed all black marks on everything and brought up left over dirt.
if you have a dirty bright interior use a magic eraser it really makes it look good as new!