How can she "work on it"? People either think she's corrupt or they don't, and everything she does will simply reinforce their existing opinion.
Well, she's spent $30 million on ads to "work on it", and where has it got her? She's now only
slightly behind in the swing states of Ohio, Pennsylvania, and Florida. I imagine she'll continue to "work on it", but my sense is that the American electorate simply isn't buying what she's peddling. The campaign would probably be doing much better were their candidate not named Hillary Clinton, a person who has
repeatedly shown herself, and
continues to show herself, to be dishonest/corrupt.