How to keep my white iphone looking clean and not a fades white?

How do I keep it looking brand new

Added (1). I was hoping it wouldn't have to involve a heavy case that takes away from the aesthetic of the phone:/

Keep a screen protecter on it and a outerbox on it (which is a hard case snapped on the iphone and then a soft one ontop ) andthat will keep it looking brand new.

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