I tried all the YouTube-recommended cleaners, and none worked well, but this stuff is brilliant! https://www.autoglym.com/glass-spray-450ml It will remove the arrows on the vents and LOCK on the door handles etc. But if you are careful, you can clean around them. After cleaning, I also used https://www.amazon.co.uk/Citadel-Colour-Undercoat-Mainland-Delivery/dp/B000A5CHHE/ref=asc_df_B000A5CHHE/?tag=googshopuk-21&linkCode=df0&hvadid=310737079164&hvpos=&hvnetw=g&hvrand=781005218586409002&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9045293&hvtargid=pla-569131654974&psc=1 on the hand brake lever, luggage strips.
I, too have no idea what this is. You can just as easily do it with 70% isopropyl rubbing alcohol. I did all the vents, buttons, ash trays in one day. So far rubbing alcohol is the easiest of all the solutions I've tried.
I used rubbing Alcohol from Amazon on my 599. The results were remarkable. Image Unavailable, Please Login Image Unavailable, Please Login