leather smudges?

i always put my phone in a leather case and now it's got these smudges. how do i get rid of them? i tried peroxide and water. please help

Answers:
saddle soap. at any farmer store. feed and seed outlet, etc.

Other answers:
just buy a new one, Leather tends to wear out like that
just buy a new one, Leather tends to wear out like that
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