been there dont that with my old rx330 lol
try Blue Magic Leather/Vinyl Cleaner
http://www.amazon.com/Blue-Magic-800.../dp/B000BOC3LY
It'll take a few tries, but it should get it off.
Once you manage to get it off, use some decent protectant. Leather Master aint bad
http://www.amazon.com/Leather-Master.../dp/B004SI1WSO
Hope that helps