I gave my chrome window surrounds a good clean the other day, but have noticed this: It's almost like they've got water on them that's dried and left a water mark, and I can't seem to get rid of it. I've tried some generic 'metal/chrome/metal effect' cleaner, but this doesn't seem to have made any difference. The pics above are what the chrome is like after cleaning and polishing. Any ideas how I can get rid of these marks? Cheers.