Restoring color of Light Gray interior?

[Sundown]

I have the light gray interior, and I was wondering what the best way was to get rid of the green/brown on the dash and panels after it gets dirty? Ive scrubbed the hell out of one area of my dash as a test spot , and Ive gotten absolutely nowhere. Im about at the end of my rope with this light gray interior (especially the dash), it just gets entirely too dirty too quickly...